Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6489690 | Portable engine generator having a fan cover with heat radiating surface | Tsutomu Hatsugai, Kouichi Asai | 2002-12-03 |
| 6362533 | Engine generator unit | Tsutomu Hatsugai | 2002-03-26 |
| 6331740 | Engine generator unit | Ryuji Tsuru | 2001-12-18 |
| 6095099 | Engine operated working machine | Tomohiro Hirano, Ryuji Tsuru | 2000-08-01 |
| 4698975 | Engine-operated machine | Teisuke Tsukamoto, Tetsuo Iida, Yuji Kishizawa, Shoichi Kato | 1987-10-13 |