Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5038690 | Waste combustion system | Seiichiro Kumagai, Hideo Aono | 1991-08-13 |
| 4995350 | 2-cycle uni-flow spark-ignition engine | Seiichiro Kumagai, Michikata Kono, Masakazu Okai | 1991-02-26 |
| 4977875 | Two-stroke-cycle uniflow spark-ignition engine | Seiichiro Kumagai, Michikata Kono, Masakazu Okai | 1990-12-18 |
| 4922865 | Two-stroke-cycle uniflow spark-ignition engine | Seiichiro Kumagai, Michikata Kono, Masakazu Okai | 1990-05-08 |
| 4630590 | Internal combustion engine apparatus | Tadashige Kondo | 1986-12-23 |
| 4507865 | Grass trimmer | Kozi Ohtagawa | 1985-04-02 |
| 4446822 | Heat insulating mounting device for carburetor | Yoetsu Yokocho | 1984-05-08 |
| 4429668 | Internal combustion engine for portable machine | Kumaichi Nakagawa | 1984-02-07 |
| 4413705 | Exhaust muffler for a two-cycle opposed cylinder engine | Takashi Fukuoka | 1983-11-08 |
| 4344395 | Ignition system with ignition timing retarding circuit for internal combustion engine | Tadashige Kondo, Susumu Ohno, Kenichi Takata | 1982-08-17 |
| D264675 | Blade for power scythe | Masato Nogawa | 1982-06-01 |
| D264042 | Blade for power scythe | Masato Nogawa | 1982-04-27 |
| 4249311 | Grass cutting apparatus | — | 1981-02-10 |
| 4223440 | Cord-type mowing machine | — | 1980-09-23 |