Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5668879 | Audio scrambling system for scrambling and descrambling audio signals | Noboru Katta, Seiji Nakamura, Hiroki Murakami | 1997-09-16 |
| 5636279 | Scramble apparatus and descramble apparatus | Noboru Katta, Hiroki Murakami, Seiji Nakamura, Toshihide Akiyama, Hiroshi Takeno | 1997-06-03 |
| 5621799 | Scrambled transmission system | Noboru Katta, Hiroki Murakami, Seiji Nakamura | 1997-04-15 |
| 5617476 | Audio scrambling system for scrambling and descrambling audio signals | Noboru Katta, Seiji Nakamura, Hiroki Murakami | 1997-04-01 |