Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6008487 | Optical-fiber inspection device | Yoshihiko Tachikawa, Takaaki Hirata, Makoto Komiyama, Yasuyuki Suzuki, Mamoru Arihara | 1999-12-28 |
| 5933235 | Optical spectrum analyzer and spectrometer | Yasuyuki Suzuki, Yoshihiko Tachikawa, Mamoru Arihara | 1999-08-03 |
| 5844235 | Optical frequency domain reflectometer for use as an optical fiber testing device | Yoshihiko Tachikawa, Takaaki Hirata, Makoto Komiyama, Yasuyuki Suzuki, Mamoru Arihara | 1998-12-01 |
| 4783851 | Optical communication system | Kiyoharu Inou, Seiichi Naito | 1988-11-08 |