Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4621172 | Fast convergence method and system for echo canceller | Akira Kanemasa | 1986-11-04 |
| 4237552 | Time division multiplexed transmission systems for telephone or like signals with frequency band compression | Shinichi Aikoh, Atsushi Tomozawa | 1980-12-02 |