JPS6414770A - Method for protecting copyright - Google Patents
Method for protecting copyrightInfo
- Publication number
- JPS6414770A JPS6414770A JP62170249A JP17024987A JPS6414770A JP S6414770 A JPS6414770 A JP S6414770A JP 62170249 A JP62170249 A JP 62170249A JP 17024987 A JP17024987 A JP 17024987A JP S6414770 A JPS6414770 A JP S6414770A
- Authority
- JP
- Japan
- Prior art keywords
- power
- battery
- information
- copy
- copying
- 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.)
- Pending
Links
Landscapes
- Storage Device Security (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62170249A JPS6414770A (en) | 1987-07-08 | 1987-07-08 | Method for protecting copyright |
EP88306101A EP0298691B1 (en) | 1987-07-08 | 1988-07-05 | Method and apparatus for protection of signal copy |
DE3851724T DE3851724T2 (de) | 1987-07-08 | 1988-07-05 | Verfahren und Gerät zum Schutz von Kopiersignalen. |
US07/216,495 US4979210A (en) | 1987-07-08 | 1988-07-08 | Method and apparatus for protection of signal copy |
US07/544,276 US5073925A (en) | 1987-07-08 | 1990-06-13 | Method and apparatus for the protection of signal copy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62170249A JPS6414770A (en) | 1987-07-08 | 1987-07-08 | Method for protecting copyright |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6414770A true JPS6414770A (en) | 1989-01-18 |
Family
ID=15901439
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62170249A Pending JPS6414770A (en) | 1987-07-08 | 1987-07-08 | Method for protecting copyright |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6414770A (ja) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57152049A (en) * | 1981-03-16 | 1982-09-20 | Usac Electronics Ind Co Ltd | Information processor limiting reproducing frequency of recording medium |
JPS61208626A (ja) * | 1985-03-13 | 1986-09-17 | Nec Corp | 媒体コピ−方式 |
-
1987
- 1987-07-08 JP JP62170249A patent/JPS6414770A/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57152049A (en) * | 1981-03-16 | 1982-09-20 | Usac Electronics Ind Co Ltd | Information processor limiting reproducing frequency of recording medium |
JPS61208626A (ja) * | 1985-03-13 | 1986-09-17 | Nec Corp | 媒体コピ−方式 |
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