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GB2209906B - Telephone instrument - Google Patents

Telephone instrument

Info

Publication number
GB2209906B
GB2209906B GB8721485A GB8721485A GB2209906B GB 2209906 B GB2209906 B GB 2209906B GB 8721485 A GB8721485 A GB 8721485A GB 8721485 A GB8721485 A GB 8721485A GB 2209906 B GB2209906 B GB 2209906B
Authority
GB
United Kingdom
Prior art keywords
telephone instrument
telephone
instrument
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
Application number
GB8721485A
Other versions
GB2209906A (en
GB8721485D0 (en
Inventor
Howard John Mitchell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Crystalate Electronics Ltd
Hosiden Besson Ltd
Original Assignee
Crystalate Electronics Ltd
Hosiden Besson Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Crystalate Electronics Ltd, Hosiden Besson Ltd filed Critical Crystalate Electronics Ltd
Priority to GB8721485A priority Critical patent/GB2209906B/en
Publication of GB8721485D0 publication Critical patent/GB8721485D0/en
Publication of GB2209906A publication Critical patent/GB2209906A/en
Application granted granted Critical
Publication of GB2209906B publication Critical patent/GB2209906B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/20—Arrangements for preventing acoustic feed-back

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
GB8721485A 1987-09-11 1987-09-11 Telephone instrument Expired - Lifetime GB2209906B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8721485A GB2209906B (en) 1987-09-11 1987-09-11 Telephone instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8721485A GB2209906B (en) 1987-09-11 1987-09-11 Telephone instrument

Publications (3)

Publication Number Publication Date
GB8721485D0 GB8721485D0 (en) 1987-10-21
GB2209906A GB2209906A (en) 1989-05-24
GB2209906B true GB2209906B (en) 1992-01-02

Family

ID=10623682

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8721485A Expired - Lifetime GB2209906B (en) 1987-09-11 1987-09-11 Telephone instrument

Country Status (1)

Country Link
GB (1) GB2209906B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256772A (en) * 1991-05-28 1992-12-16 So Hing Chung Telephone with proximity switch
GB2452017A (en) * 2007-06-28 2009-02-25 Symbian Software Ltd Input Locking
US8577343B2 (en) 2011-10-04 2013-11-05 Qualcomm Incorporated Inhibiting unintended outgoing communication in mobile devices

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1185777A (en) * 1968-02-26 1970-03-25 Brown Ltd S G Improvements in or relating to Telephone Handsets

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1185777A (en) * 1968-02-26 1970-03-25 Brown Ltd S G Improvements in or relating to Telephone Handsets

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Microphones in Action, V. Capel pp22-24 *

Also Published As

Publication number Publication date
GB2209906A (en) 1989-05-24
GB8721485D0 (en) 1987-10-21

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020911