Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7366657 | Voice signal processing system mounted with echo canceller and voice signal processing method | Yasushi Numata | 2008-04-29 |
| 6947553 | Communication system for controlling training of echo canceller and line switching system | Kazuya Suzuki | 2005-09-20 |
| 6604913 | Vane pump | Katsuya Arakawa, Isamu Kikuchi | 2003-08-12 |
| 5284226 | Carriage guiding post in a transfer lifter | Katsuyoshi Makimura, Masahiro Ishibashi | 1994-02-08 |