Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6415072 | Optical wavelength multiplexing and dividing device | Hiroyuki Koshi, Takeshi Nakajima, Kanji Tanaka | 2002-07-02 |
| 6393170 | Optical multiplexer/demultiplexer | Takeshi Nakajima, Kanji Tanaka | 2002-05-21 |
| 6195481 | Array waveguide diffraction grating optical multiplexer/demultiplexer | Takeshi Nakajima, Hiroyuki Koshi | 2001-02-27 |
| 5090876 | Scroll type fluid handling machine | Takeshi Seto | 1992-02-25 |
| 4260343 | Vane compressor | Risaburo Watanabe, Masami Ohtani | 1981-04-07 |
| 4248575 | Rotary fluid pressure biased vane compressor with pressure release means | Risaburo Watanabe, Masami Ohtani | 1981-02-03 |