Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7574730 | Device and system for reducing confluence noise | Minoru Ishida | 2009-08-11 |
| 6868552 | Ingress noise control system and ingress noise blocking device | Hiroo Tamura, Minoru Ishida, Kazunari Inoue, Takayuki Tyou | 2005-03-15 |
| 6198478 | CATV transmission center apparatus, subscriber terminal device, CATV distribution system, and method of distributing program | Masao Ota, Hiroo Tamura | 2001-03-06 |
| 6184920 | Picture signal transmitting system using CATV network in which the local oscillator is transmitted separately | Hiroyuki Yatsuka, Koji Arai | 2001-02-06 |
| 5680238 | Hybrid SCM optical transmission apparatus | — | 1997-10-21 |
| 5165077 | Optical drop-and-insert apparatus | Hiroyuki Rokugawa, Nobuhiro Fujimoto | 1992-11-17 |
| 5023863 | Optical switching system | — | 1991-06-11 |
| 4621925 | Fiber-optic gyro | Takeo Iwama | 1986-11-11 |