Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878925 | Apparatus for removing foreign substances in gas | — | 1989-11-07 |
| 4873760 | Vessel lid mounting and demounting apparatus | Naoto Watanabe, Akira Tanaka, Takayuki Matsumoto, Yutaka Ohmura | 1989-10-17 |