Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6662765 | Two-stroke internal combustion engine | — | 2003-12-16 |
| 6662766 | Two-stroke internal combustion engine | Yumin Liu | 2003-12-16 |
| 6640755 | Two-cycle internal combustion engine | — | 2003-11-04 |
| 6595168 | Two-stroke internal combustion engine | — | 2003-07-22 |
| 6595178 | Two-stroke internal combustion engine | — | 2003-07-22 |
| 6450135 | Two-stroke internal combustion engine | — | 2002-09-17 |
| 6367432 | Two-stroke cycle internal combustion engine | — | 2002-04-09 |
| 6332440 | Four-stroke cycle internal combustion engine | Noboru Nagai, Yumin Liu | 2001-12-25 |
| 6283084 | Four-stroke cycle internal combustion engine | Noboru Nagai, Yumin Liu | 2001-09-04 |
| 6258315 | Furnace body structural member for metallurgical shaft furnace | Kenichi Fukagawa, Atsushi Sakai, Takashi Sumigama | 2001-07-10 |
| 6119648 | Four-stroke cycle internal combustion engine | — | 2000-09-19 |
| 6098582 | Four-stroke cycle internal combustion engine | — | 2000-08-08 |
| 5960764 | Four-stroke internal combustion engine | — | 1999-10-05 |
| 5947068 | Four-stroke cycle internal combustion engine | — | 1999-09-07 |
| 5615650 | Engine | — | 1997-04-01 |
| 5121810 | Muffler cover | — | 1992-06-16 |
| 4832151 | Muffler cover for internal combustion engine | — | 1989-05-23 |
| H517 | Recoil starter device | Shigeru Sato | 1988-09-06 |