Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D309087 | Electric chain saw | Toshiaki Saito | 1990-07-10 |
| D288896 | Electric chainsaw | Kazuyuki Takahashi, Yasuhiro Oe | 1987-03-24 |
| D286131 | Router | — | 1986-10-14 |
| D286132 | Router | — | 1986-10-14 |
| D280883 | Portable electric drill | Masakazu Sakamoto, Teruhisa Numata | 1985-10-08 |