Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5325664 | System for determining deterioration of catalysts of internal combustion engines | Yasunari Seki, Toshihiko Sato, Katuhiro Kumagai, Hiroshi Maruyama, Yoichi Iwata +8 more | 1994-07-05 |