EP0689633B1 - Procede pour l'exploitation d'un systeme de fermeture telecommandable dans un procede de dialogue, par exemple sur un vehicule automobile - Google Patents
Procede pour l'exploitation d'un systeme de fermeture telecommandable dans un procede de dialogue, par exemple sur un vehicule automobile Download PDFInfo
- Publication number
- EP0689633B1 EP0689633B1 EP94908273A EP94908273A EP0689633B1 EP 0689633 B1 EP0689633 B1 EP 0689633B1 EP 94908273 A EP94908273 A EP 94908273A EP 94908273 A EP94908273 A EP 94908273A EP 0689633 B1 EP0689633 B1 EP 0689633B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- code
- signal
- lock
- algorithm
- key
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
- G07C2009/00388—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks code verification carried out according to the challenge/response method
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
- G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
Definitions
- the invention is based on that in the preamble of the claim 1 defined object that operated for itself with a change code according to the above second group, is known, cf. DE-A1-32 25 754, especially the explanations of Tables 1 and 2 there from page 9, last paragraph.
- the first code sent out is not a code a long series of codes, all starting from an initializing original code, in the key unit be formed according to the same first algorithm.
- a known remote control device (GB 2 253 291 A) has a portable and a stationary transceiver unit on. Parts of a code signal are from the portable Unit sent to the stationary unit and there compared with expected signals. If they match an acknowledgment signal is returned to the portable unit sent, causing the next parts of the code signal to last be sent until the entire code signal is correct and received completely. Then a Release signal sent to a control unit.
- the invention was initially developed for a motor vehicle. But it turned out that it also applied to others, Locking systems falling under the generic term mentioned is applicable. Namely, the invention is e.g. also suitable for garages, warehouses, front doors etc.
- a major problem with such procedures is the avoidance of Break-ins, the burglars through a prohibited recording of encoded signals representing the original key unit sends out, become possible. Especially then, if the key unit is accidentally activated was received without the lock unit receiving this signal then the burglar could normally already by recording the code this accidentally emitted Signal by breaking this code Send the lock unit receiver in good time before the code - for whatever reason - is updated.
- the figure thus shows an example of the operation according to the invention one in dialog mode by the exchanged signals 1, 2, 3 remotely controllable - e.g. lockable and unlockable - locking system a motor vehicle
- the code formation according to the above described second group is that the code of the Key unit from its actuation to its next actuation can be advanced - at least as long as this key unit a second signal 2 from the transmitter that is currently modulated in a valid manner the lock unit receives.
- E symbolizes the operation in the figure of the lock-side computer and S the operation of the key-side Calculator, each in the course of - even with this type of Alternating code formation - progressive time t.
- the between the Lock unit, cf. E, and the key unit, cf. S, exchanged three signals 1, 2 and 3 represent e.g. coded radio, light or Represent ultrasonic signals.
- the invention thus has a portable key unit.
- This contains a key-side transmitter, a key-side receiver and a key-side calculator, cf. S.
- the invention also provides an example of the object the motor vehicle-mounted lock unit, which has a lock-side Transmitter, a lock-side receiver, a lock-side computer, see. E, as well as a known output unit for control, see. V, the lock - e.g. to control the locking of the Castle - contains.
- the different codes of the signals each represent change codes, i.e. no codes that always be used consistently.
- the used according to the invention Put codes - especially when the second group of alternate codes was chosen - both in the key and in the lock-side computer algorithmically formed codes from a very long code sequence. If the then from the lock unit E and algorithms used completely by the key unit S. are identical, then the first code 1 can be called a code n, whereby the second code x is then designated as n + 1 can, and accordingly the third code y as n + 2, etc.
- the first algorithm used to form the first and of the third signal 1 and 3 is also used, as described below be identical to the second algorithm used to form the second Signal 2 is used. But first a case is described where the first and second algorithms are different.
- the codes in the computers S and E according to the second alternating code formation group form and around the received signals, cf. 1 to 3, to be able to check their validity in the receiving computer then when the key signals 1 and 2 after a first Algorithm, the lock-side signals 2 but according to another, second algorithm are formed, both in the lock side and both algorithms are stored in the key-side memory, both the first algorithm that is used to form the codes of the key-side signals 1 and 3 is necessary, as well as that second Algorithm used to form the codes of the lock-side signal 2 is necessary.
- Code last as valid codes for signal 3 and / or 2 and / or 1 was used; it can be there in the stores - alternatively or additionally - but also that code or those codes are saved be the next currently valid code n or x of the first and of the second signal 1 and 2, possibly also as the next valid code y of the third signal is to be used.
- the key transmitter sends when actuated the key unit first to the lock-side receiver the lock unit a first formed according to the first algorithm Signal 1 off, which contains a first, currently valid code n - in the code sequence corresponding to the first algorithm - modulated is. If the computer E of the lock unit from the lock side Receiver received first code n as the currently valid first Recognizes code n of the key system, then sends the Lock unit E in turn, in response to that according to its own second Algorithm f (n) formed signal 2, the second, current valid code x of the code sequence corresponding to the second algorithm is modulated back to the key-side receiver S.
- the computer S the key unit from the lock-side transmitter sent code x as the second code x of the Recognizes key system, then sends the key unit S in turn again the third signal 3 in response, which according to the first Algorithm modulated with the third, then currently valid code y is to the lock-side receiver.
- the lock unit S finally controls by means of its output unit V the lock - e.g. the locking of this lock - if the lock-side computer E the third signal 3 with the then valid Code y received.
- the lock-side computer E receives the code of the third signal 3 recognized as valid - only then - turns the lock-side Calculator for a new, currently valid code for the next first Signal 1 on.
- This lock-side computer E e.g. to the immediately next one, formed according to the first algorithm Code y + 1 - or to a specific code y + k following a value k given to the locking system in question - than that from now on set the next valid code that this computer for would recognize a next signal 1.
- the key calculator S then arises when he recognized the second signal 2 as valid and therefore could send out the third signal 3, also on the same Code y + 1 or y + k as the next currently valid code for the next actuation of the lock, i.e. for its next first signal 1 a.
- the first algorithm really differs from the second Algorithm. Then the burglar, even if he is a according second signal 2 formed by the second algorithm would have guessed particularly hard, according to which first algorithm that first and third signals 1 and 3 were formed. This difficulty the burglar has especially when his listening recording device additionally had trouble the three different ones Separate signals 1, 2 and 3 clearly, namely especially when there is a particularly rapid succession of the three Signals 1 to 3 was set up, or if the locking system was deliberately dimensioned so that the three signals 1 to 1 for overlap with a burglar who can hardly be disentangled.
- the change code used according to the invention switches to one every proper actuation of the locking system to new ones other, then currently valid codes of the code sequence / code sequences before the burglar immediately hears the recorded codes can use for the burglary. So the burglar is not just that Determination of the first algorithm is difficult.
- the third signal 3 can even in this case which - according to the first algorithm - immediately following code n Code n + 1 must be modulated because the code x of the second signal 2 is not formed according to the first algorithm.
- the second signal 2 can also be independent of the respective one digital value of code n, namely according to a second, from the first Different algorithm can be encoded if the second algorithm is also an alternate code, which e.g. also originally with a special one for the second algorithm certain original code was initialized. That with the code x according to The second algorithm 2 coded second algorithm is then immediately in response to the received signal 1, recognized as valid, then the algorithms used for the burglar especially are opaque.
- the lock-side receiver can be reached to avoid the impending loss of synchronization as a precaution in the computer E on the lock side a catch area F, even if comprising only a few increments set up, e.g. only two or three increments - e.g. n and n + 1 and n + 2 - of the code. Then this is also quite rare Case - at least to a certain extent - also an automatic one Resynchronization in a very small capture range F guaranteed.
- the first, the second and the third signal (1 to 3) more or less secondly, but only so greatly overlap that the codes received by the receivers (n, x, y) checked by the assigned computers (S, E) for their validity is particularly difficult for the burglar, by listening to a dialog, conclusions about the algorithm used / to draw the algorithms used.
- the invention thus permits a corresponding operation Locking system to offer that just the benefits of the previous Process claims allowed to exploit specified measures.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lock And Its Accessories (AREA)
Claims (9)
- Procédé de mise en oeuvre d'un système de fermeture d'un objet, par exemple un véhicule automobile, pouvant être télécommandé - par exemple verrouillé et déverrouillé - suivant un processus de dialogue au moyen de signaux (1, 2, 3), à savoir des signaux radio, lumineux ou par ultrasons,comportant une unité de clé, portable, qui contient un émetteur côté clé, un récepteur côté clé et un calculateur côté clé (S),comportant une unité de serrure, montée sur l'objet, qui contient un émetteur côté serrure, un récepteur côté serrure, un calculateur côté serrure (2) et une unité de sortie servant à la commande (V) de la serrure, par exemple pour la commande du verrouillage de la serrure,selon lequel les codes (n, x, y, y+1) des signaux (1, 2, 3) représentent chacun respectivement des codes variables qui constituent des suites de codes (par exemple code n, code x = n+1, code y = n+2) obtenues par calcul suivant un algorithme et produites aussi bien dans le calculateur côté clé que dans le calculateur côté serrure etselon lequel les différents codes, qui sont formés chacun dans l'unité de clé (S) pour des signaux (1, 3) devant être émis par celle-ci, avancent chacun - par exemple au moyen de l'actionnement de l'unité de clé ou d'une manière commandée par une horloge - conformément à un premier algorithme,en ce que, lors d'un actionnement de l'unité de clé, l'émetteur de celle-ci envoie d'abord un premier signal (1) au récepteur côté serrure, le premier signal (1) étant modulé par un premier code momentanément valable (n) formé conformément au premier algorithme et issu de la suite de codes correspondant au premier algorithme,en ce qu'ensuite, lorsque son calculateur (E) reconnaít le premier code (n) reçu comme étant le premier code (n) valable, l'unité de serrure recevant le premier signal (1) envoie pour sa part, en réponse, un deuxième signal (2) au récepteur côté clé, le deuxième signal (2) étant modulé avec un deuxième code momentanément valable (x = f(n)) formé conformément à un second algorithme (f(n) et issu de la suite de codes correspondant au second algorithme (f(n)),en ce qu'ensuite, lorsque son calculateur (S) reconnaít le code (x = f(n)) reçu avec le deuxième signal (2) comme deuxième code (x) valable du système de clé, l'unité de clé renvoie à l'unité de serrure (E), en réponse, un troisième signal (3), le troisième signal (3) étant modulé par un troisième code momentanément valable (y) formé conformément au premier algorithme et issu de la suite de codes correspondant au premier algorithme,et en ce qu'au moyen de son unité de sortie (V), l'unité de serrure (E) commande la serrure si le calculateur côté serrure (E) reconnaít le troisième code (y), reçu, comme étant le code valable pour le troisième signal (3).
- Procédé suivant la revendication 1, caractériséen ce que le second algorithme convertit constamment (x = (f(n)) le code (n) du premier signal reçu (1), reconnu comme valable, conformément à un second algorithme (f(n)) qui diffère du premier algorithme eten ce que l'émetteur côté serrure de ce code (x) converti émet vers le récepteur côté clé d'une manière modulée sur le deuxième signal (2).
- Procédé suivant la revendication 1, caractériséen ce que le premier algorithme est identique au second algorithme, de sorte que le code (n) du premier signal (1), le code (x) du deuxième signal (2) et le code (y) du troisième signal (3), faisant chacun partie des codes successifs (n, x = n+1, y = n+2) formés respectivement conformément au même algorithme, constituent une seule et même suite de codes.
- Procédé à code variable pouvant avancer sous l'effet de l'actionnement de l'unité de serrure, suivant l'une des revendications précédentes, caractériséen ce que le code (n) du premier signal (1) correspondant au calculateur prévu pour le calculateur côté serrure (E) doit être situé dans une plage d'interception (F) qui est formée par un nombre nettement limité des codes (n-1, n, n+1, ..., n+m) que le calculateur côté serrure (E) doit attendre en tant que prochain code valable conformément au premier algorithme.
- Procédé à code variable pouvant avancer sous l'effet de l'actionnement de l'unité de serrure selon l'une des revendications 1 à 3, caractériséen ce que, lors de son activation par le premier code émis (n) valable, le calculateur (S) de l'unité de clé n'avance au code (y = n+1, ou y = n+2) de la suite de codes formée conformément au premier algorithme, code qui est formé conformément au premier algorithme et doit être émis avec le troisième signal (3), que si l'unité de clé (S) a reçu le deuxième signal (2) correctement, avec le code (x) valable pour celle-ci, dans un bref délai (par exemple quelques fractions de secondes), courant pour le deuxième signal (2).
- Procédé suivant la revendication 5, caractériséen ce que le calculateur (E) de l'unité de serrure n'avance, conformément au premier algorithme, au prochain code en tant que code (y+1) de la suite de codes formée conformément au premier algorithme, code qui est valable pour lui pour un premier signal (1), que si l'unité de serrure (E) a reçu le troisième signal (3) correctement, avec le code (y) valable pour elle, dans un bref délai (par exemple quelques fractions de millisecondes), courant pour le troisième signal (3).
- Procédé suivant la revendication 5 ou 6, caractériséen ce que, malgré tout, une plage d'intersection (F) contenant ne serait-ce que quelques avances est prévue dans l'unité de serrure (E).
- Procédé suivant l'une des revendications précédentes, caractériséen ce que les premier, deuxième et troisième signaux (1 à 3) se chevauchent dans le temps plus ou moins, mais seulement à un point tel que les codes (n, x, y) reçus par les récepteurs peuvent encore être vérifiés en ce qui concerne leur validité par les calculateurs associés (S, E).
- Dispositif de mise en oeuvre du procédé suivant l'une des revendications précédentes, comprenantune unité de clé, portable, comportant un émetteur côté clé, un récepteur côté clé et un calculateur côté clé (S) etune unité de serrure, montée sur un objet, qui comporte un émetteur côté serrure, un récepteur côté serrure, un calculateur côté serrure (E) et une unité de sortie servant à verrouiller ou déverrouiller la serrure,dans lequel, lors d'un actionnement de l'unité de clé, l'émetteur de celle-ci envoie d'abord un premier signal (1) au récepteur côté serrure, ensuite, si son calculateur (E) reconnaít le premier code (n), reçu, comme étant le premier code (n) valable, l'unité de serrure envoie pour sa part, en réponse, un deuxième signal (2) au récepteur côté clé, puis, l'unité de clé renvoie pour sa part, en réponse, un troisième signal (3) à l'unité de serrure (E) si son calculateur (S) reconnaít le code (x = f(n)), reçu avec le deuxième signal (2), comme deuxième code (x) valable du système de clé etdans lequel, au moyen de son unité de sortie (V), l'unité de serrure (E) verrouille ou déverrouille la serrure si le calculateur côté serrure (E) reconnaít le troisième code (y), reçu, comme étant le code valable pour le troisième signal (3).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4308899A DE4308899C1 (de) | 1993-03-19 | 1993-03-19 | Verfahren zum Betrieb eines in einem Dialogverfahren fernsteuerbaren Schließsystemes, z.B. eines Kfz |
DE4308899 | 1993-03-19 | ||
PCT/DE1994/000216 WO1994021878A1 (fr) | 1993-03-19 | 1994-03-01 | Procede pour l'exploitation d'un systeme de fermeture telecommandable dans un procede de dialogue, par exemple sur un vehicule automobile |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0689633A1 EP0689633A1 (fr) | 1996-01-03 |
EP0689633B1 true EP0689633B1 (fr) | 1998-09-23 |
Family
ID=6483288
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94908273A Expired - Lifetime EP0689633B1 (fr) | 1993-03-19 | 1994-03-01 | Procede pour l'exploitation d'un systeme de fermeture telecommandable dans un procede de dialogue, par exemple sur un vehicule automobile |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0689633B1 (fr) |
DE (2) | DE4308899C1 (fr) |
WO (1) | WO1994021878A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4411435A1 (de) * | 1994-03-31 | 1995-10-05 | Bayerische Motoren Werke Ag | Verfahren zum Steuern der Benutzung eines Kraftfahrzeugs mit Hilfe eines aus zwei Teilen bestehenden Codesignals |
DE4440349A1 (de) * | 1994-11-11 | 1996-05-15 | Bayerische Motoren Werke Ag | Verfahren zum Synchronisieren zweier dialogfähiger Sender-Empfängereinheiten für ein Codesignal in einer Kraftfahrzeug-Schließanlage |
DE19516992C1 (de) * | 1995-05-09 | 1996-04-04 | Siemens Ag | Verfahren zum Betreiben einer Diebstahlschutzeinrichtung für ein Kraftfahrzeug und Diebstahlschutzeinrichtung |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3225754A1 (de) * | 1982-07-09 | 1984-01-12 | Hülsbeck & Fürst GmbH & Co KG, 5620 Velbert | Verfahren zur schliesswirksamen wechselwirkung eines schluesselartigen teils mit einem schlossartigen teil |
DE3536378A1 (de) * | 1985-10-11 | 1987-04-16 | Bayerische Motoren Werke Ag | Sicherheitseinrichtung fuer ein kraftfahrzeug |
DE3636822C2 (de) * | 1986-10-29 | 1993-12-23 | Ruf Kg Wilhelm | Elektronische Fernbetätigungseinrichtung, insbesondere für Zentralverriegelungsanlagen von Kraftfahrzeugen |
JP2731945B2 (ja) * | 1989-06-05 | 1998-03-25 | エヌ・ティ・ティ・データ通信株式会社 | 個別鍵による認証が可能なicカード |
US5144667A (en) * | 1990-12-20 | 1992-09-01 | Delco Electronics Corporation | Method of secure remote access |
GB2253291B (en) * | 1991-02-26 | 1994-08-17 | Kevin Bell | Signalling apparatus |
-
1993
- 1993-03-19 DE DE4308899A patent/DE4308899C1/de not_active Expired - Fee Related
-
1994
- 1994-03-01 EP EP94908273A patent/EP0689633B1/fr not_active Expired - Lifetime
- 1994-03-01 DE DE59406978T patent/DE59406978D1/de not_active Expired - Fee Related
- 1994-03-01 WO PCT/DE1994/000216 patent/WO1994021878A1/fr active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
WO1994021878A1 (fr) | 1994-09-29 |
EP0689633A1 (fr) | 1996-01-03 |
DE59406978D1 (de) | 1998-10-29 |
DE4308899C1 (de) | 1994-02-03 |
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