Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839019 | Oxygen sensor | Teizo Takahama, Keisuke Sugimoto, Yuji Sugiyama | 1989-06-13 |
| 4762605 | Oxygen sensor | Takeo Tanaka, Keisuke Sugimoto, Yuji Sugiyama, Hideo Shiraishi, Teizo Takahama | 1988-08-09 |