Issued Patents All Time
Showing 51–54 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4541974 | Semiconductive ceramic compositions with a nonlinear volt-ampere characteristic, and process for preparing coherent bodies of such compositions | Nobutatsu Yamaoka, Kazuo Sasazawa | 1985-09-17 |
| 4519942 | Semiconductive ceramic compositions with a nonlinear volt-ampere characteristic, and process for preparing coherent bodies of such compositions | Nobutatsu Yamaoka, Kazuo Sasazawa | 1985-05-28 |
| D270390 | Vacuum cleaner | Isao Ayukawa, Sachio Yamamoto | 1983-08-30 |
| D270298 | Vacuum cleaner | Isao Ayukawa, Sachio Yamamoto | 1983-08-23 |