Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4706446 | Lawn mower | Hachiro Doi | 1987-11-17 |
| 4520619 | Lawn mower | Hachiro Doi | 1985-06-04 |
| 4262475 | Method and apparatus for collecting grass clippings | Katsuhiko Takahashi, Hachiro Doi | 1981-04-21 |