Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4972467 | Echo canceller | Fujio Nakagawa | 1990-11-20 |
| 4965823 | Echo canceller | Fujio Nakagawa | 1990-10-23 |
| 4933934 | Time division multiplexing method with channel compression and a device therefor | Shinichi Aikoh | 1990-06-12 |
| 4769808 | Method of cancelling echoes in full-duplex data transmission system | Akihiko Sugiyama | 1988-09-06 |
| 4730343 | Decision feedback equalizer with a pattern detector | Akihiko Sugiyama | 1988-03-08 |
| 4707824 | Method and apparatus for cancelling echo | — | 1987-11-17 |
| 4621172 | Fast convergence method and system for echo canceller | Kunihiko Niwa | 1986-11-04 |
| 4605826 | Echo canceler with cascaded filter structure | — | 1986-08-12 |
| 4407018 | Digital signal processor suited for LSI fabrication | — | 1983-09-27 |
| 4215415 | Recursive digital filter comprising a circuit responsive to first sum and feedback sign bits and second sum sign and integer bits for detecting overflow in the second sum | Hisashi Sakaguchi | 1980-07-29 |