Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D305432 | Internal combustion engine | — | 1990-01-09 |
| 4664228 | Lubrication system for a vertical shaft engine | Tatsutoshi Umeda | 1987-05-12 |
| 4426964 | Runner-type lubricating device for vertical engine | Tatsutoshi Umeda | 1984-01-24 |