Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8225776 | Power unit for portable chain saw | Kunimune Kawamura | 2012-07-24 |
| 6807954 | Portable power working machine | Fujio Kobayashi | 2004-10-26 |
| 6643939 | Chain saw with vibration-isolating devices | Katsuya Tajima, Hisato Ohsawa | 2003-11-11 |