Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5030073 | Rotary compressor | Yukio Serizawa, Yuukichi Nakada | 1991-07-09 |
| 4726016 | Conference system | Seiya Uchida, Masaharu Kamigaki | 1988-02-16 |
| 4551583 | Control signal transmission system for key telephone system | Hikaru Takematsu, Kazuyuki Yamamoto, Teruyuki Kubo | 1985-11-05 |
| 4314109 | Synchronization system for key telephone system | Kazuyuki Yamamoto | 1982-02-02 |
| 4280022 | Key telephone systems | Hikaru Takematsu, Kazutada Tatsukura | 1981-07-21 |