Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6155356 | Percussion tool | Atsuyuki Kikuchi, Sinki Ohtsu, Akihisa Yahagi | 2000-12-05 |
| 5971403 | Holding device for percussion tool | Akihisa Yahagi | 1999-10-26 |
| 5522466 | Vibration-damping structure for electric hammer | Akihisa Yahagi | 1996-06-04 |
| D335619 | Portable electric hammer | Yasunori Ogawa, Norio Nitta | 1993-05-18 |