Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11624337 | Two-cycle engine | Ken Shirai | 2023-04-11 |
| 10927789 | Stratified scavenging engine and portable work machine | Ken Shirai, Tetsuya Isogai | 2021-02-23 |
| 10415496 | Handheld engine-driven working machine | Takamasa Otsuji, Kosuke Matsumoto, Hiroyuki Miyaki, Akira Yamazaki | 2019-09-17 |
| 9945290 | Handheld engine-driven working machine | Takamasa Otsuji, Kosuke Matsumoto, Hiroyuki Miyaki, Akira Yamazaki | 2018-04-17 |
| 7011078 | Two-stroke internal combustion engine | Kentaro Matsuo, Keita Kamo, Hidekazu Tsunoda | 2006-03-14 |
| 6513465 | Two-stroke internal combustion engine | Takashi Fukuoka, Mitsujiro Mochizuka | 2003-02-04 |
| 6142113 | Two-cycle internal combustion engine and cylinder | Mitsujiro Mochizuka, Shigeru Taniguchi, Masami Uchida, Masayoshi Miyamoto | 2000-11-07 |
| 5699761 | Two-stroke internal combustion engine | Masayoshi Miyamoto | 1997-12-23 |