Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5539668 | Optical switching apparatus | Yasunori Tokuda, Yuji Abe | 1996-07-23 |
| 5400436 | Information retrieval system | Wolfgang Banzhaf, Toshinao Ishii, Takashi Iwamoto | 1995-03-21 |
| 4764415 | Electric element using oxidation-reduction substances | Satoru Isoda, Satoshi Ueyama, Hiroaki Kawakubo, Akemi Ogura | 1988-08-16 |