Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4404031 | Process for producing hydraulic cements | Keiichi Minegishi, Kanjiro Ishizaki, Ikuo Uchida | 1983-09-13 |
| 4344062 | Humidity sensor element | Keiichi Minegishi, Tokuji Akiba, Tadao Kato, Norio Ogawa | 1982-08-10 |