Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873760 | Vessel lid mounting and demounting apparatus | Naoto Watanabe, Akira Tanaka, Takayuki Matsumoto, Hisao Kojima | 1989-10-17 |
| 4855077 | Sticking agent of ionic-conductive polymer | Yasuo Shikinami, Kunihiro Hata | 1989-08-08 |