Issued Patents 2021
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11207769 | Hydraulic hammering device | — | 2021-12-28 |
| 11072977 | Two-piston hydraulic striking device | Toshio Matsuda | 2021-07-27 |
| 11052524 | Hydraulic hammering device | — | 2021-07-06 |
| 11034010 | Hydraulic hammering device | Tsutomu Kaneko, Toshio Matsuda | 2021-06-15 |