Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7158538 | Transmitting apparatus, transmitting method, receiving apparatus, receiving method, and transmitting and receiving system | Toshio Okada | 2007-01-02 |
| 6594052 | Transmitting apparatus and method, receiving apparatus and method, distribution medium and transmitting system | Toshio Okada, Takashi Iwasa, Yoshiyuki Sato | 2003-07-15 |
| 6590373 | Regenerative load apparatus and load test method | — | 2003-07-08 |
| 5636141 | Method and appartus for accumulating and supplying signals | — | 1997-06-03 |
| 5180307 | Learning apparatus | — | 1993-01-19 |
| 5065317 | Language laboratory systems | Yoshiko Matsushita | 1991-11-12 |
| 4786255 | Group education system | Taiji Kitami, Tetsuzo Kano, Akira Masuda, Yoshiko Matsushita, Ryuji Suzuki +2 more | 1988-11-22 |
| 4280136 | Tape cassette and label inspection system therefor | Tsunehiro Kashima, Shunsuke Sakoda, Hidetoshi Tsuda, Kazuyuki Morita | 1981-07-21 |