Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5607490 | Filter having chemical resistance, antistatic property and water vapor resistance, and process for producing the same | Seihou Taniguchi, Takeshi Hazeyama | 1997-03-04 |
| 5558689 | Reinforced filter element | Hiroyuki Yanagihara, Seihou Taniguchi, Takeshi Hazeyama, Teiji Hashimoto, Sansan Souma | 1996-09-24 |
| 4864607 | Animated annunciator apparatus | Isao Mitamura | 1989-09-05 |
| 4721437 | Animated annunciator apparatus | Isao Mitamura | 1988-01-26 |