IT1139503B - HIGH DENSITY INFORMATION SUPPORT DISCS - Google Patents
HIGH DENSITY INFORMATION SUPPORT DISCSInfo
- Publication number
- IT1139503B IT1139503B IT24359/81A IT2435981A IT1139503B IT 1139503 B IT1139503 B IT 1139503B IT 24359/81 A IT24359/81 A IT 24359/81A IT 2435981 A IT2435981 A IT 2435981A IT 1139503 B IT1139503 B IT 1139503B
- Authority
- IT
- Italy
- Prior art keywords
- high density
- density information
- information support
- support discs
- discs
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/0057—Intermediate mediums, i.e. mediums provided with an information structure not specific to the method of reproducing or duplication such as matrixes for mechanical pressing of an information structure ; record carriers having a relief information structure provided with or included in layers not specific for a single reproducing method; apparatus or processes specially adapted for their manufacture
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
- G11B9/06—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using record carriers having variable electrical capacitance; Record carriers therefor
- G11B9/061—Record carriers characterised by their structure or form or by the selection of the material; Apparatus or processes specially adapted for the manufacture of record carriers
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20105680A | 1980-10-27 | 1980-10-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8124359A0 IT8124359A0 (en) | 1981-10-06 |
IT1139503B true IT1139503B (en) | 1986-09-24 |
Family
ID=22744295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT24359/81A IT1139503B (en) | 1980-10-27 | 1981-10-06 | HIGH DENSITY INFORMATION SUPPORT DISCS |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS57109139A (en) |
AT (1) | AT375479B (en) |
DE (1) | DE3141545A1 (en) |
FR (1) | FR2493020B1 (en) |
GB (1) | GB2086125B (en) |
IT (1) | IT1139503B (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3842194A (en) * | 1971-03-22 | 1974-10-15 | Rca Corp | Information records and recording/playback systems therefor |
GB1417708A (en) * | 1972-04-19 | 1975-12-17 | Rca Corp | Electron beam recording |
DE2603888B2 (en) * | 1975-02-24 | 1977-12-15 | MCA Disco-Vision, Znc, Universal City, Calif. (V-StA.) | Process for the production of a replica die for information carrier and die for the formation of video disc reproduction |
US4241120A (en) * | 1978-11-13 | 1980-12-23 | Rca Corporation | Video discs and molding compositions therefor |
US4228050A (en) * | 1979-01-15 | 1980-10-14 | Rca Corporation | Conductive molding composition |
US4472337A (en) * | 1979-11-07 | 1984-09-18 | Rca Corporation | Video disc processing |
-
1981
- 1981-10-06 IT IT24359/81A patent/IT1139503B/en active
- 1981-10-20 DE DE19813141545 patent/DE3141545A1/en not_active Withdrawn
- 1981-10-22 FR FR8119834A patent/FR2493020B1/en not_active Expired
- 1981-10-23 GB GB8131972A patent/GB2086125B/en not_active Expired
- 1981-10-23 JP JP56170648A patent/JPS57109139A/en active Pending
- 1981-10-27 AT AT0457281A patent/AT375479B/en active
Also Published As
Publication number | Publication date |
---|---|
ATA457281A (en) | 1983-12-15 |
AT375479B (en) | 1984-08-10 |
JPS57109139A (en) | 1982-07-07 |
FR2493020B1 (en) | 1986-04-04 |
IT8124359A0 (en) | 1981-10-06 |
DE3141545A1 (en) | 1982-07-08 |
GB2086125A (en) | 1982-05-06 |
FR2493020A1 (en) | 1982-04-30 |
GB2086125B (en) | 1985-08-07 |
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