Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5950419 | Method of and system for purifying exhaust gas for engines | Hirofumi Nishimura, Tadataka Nakazumi, Ken Umehara, Masanori Misumi | 1999-09-14 |
| 5462039 | Air-fuel ratio control system for internal combustion engine | Kiyotaka Mamiya, Michihiro Imada | 1995-10-31 |