Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12386331 | Control device for performing test of safety signal circuit, and control method for performing test of safety signal circuit | — | 2025-08-12 |
| 11256226 | Servomotor control device with counterforce command calculation | Keisuke Tsujikawa | 2022-02-22 |
| 10915093 | Numerical controller | — | 2021-02-09 |
| 10802476 | Numerical controller with learned pressure estimation | Keisuke Tsujikawa | 2020-10-13 |
| 10488299 | Controller and control method for doubly checking the state of a control shaft | — | 2019-11-26 |
| 10394225 | Synchronization controller having function of solving shock generated in synchronization start block | — | 2019-08-27 |
| 9188966 | Host controller generating position control gain | — | 2015-11-17 |
| 7759895 | Numerical controller and synchronous control method using numerical controller | Tetsuo Hishikawa | 2010-07-20 |
| 7331208 | Die cushion controller | Kentaro Fujibayashi, Tetsuo Hishikawa, Keisuke Tsujikawa | 2008-02-19 |
| 5259494 | Pallet exchanging device for machine tool | — | 1993-11-09 |
| 4873756 | Machine tool | Hisaaki Yamane | 1989-10-17 |
| 4858290 | Machine tool indexing apparatus | Akira Hirose | 1989-08-22 |
| D302164 | Drilling, tapping and milling machine | Kazuo Itoh, Yasuyo Isaji, Takashi Nozu | 1989-07-11 |
| D302163 | Drilling, tapping and milling machine | Kazuo Itoh, Yasuyo Isaji, Takashi Nozu | 1989-07-11 |
| 4835838 | Automatic tool changer in machine tool | — | 1989-06-06 |
| 4813122 | Machine tool | Kikuo Watanabe, Mitsuo Kobayashi, Keiichi Sato | 1989-03-21 |
| 4679296 | Machine tool | Kikuo Watanabe, Mitsuo Kobayashi, Keiichi Sato | 1987-07-14 |
| 4473329 | Cyclic drilling machine | Shozo Aoshima, Michio Ishikawa | 1984-09-25 |
| 4446746 | Torque detecting apparatus | Shozo Aoshima, Michio Ishikawa | 1984-05-08 |
| 4421441 | Cyclic drilling machine | — | 1983-12-20 |
| D268185 | Drilling machine | Yoshinari Mori | 1983-03-08 |
| 4371297 | Machine tool | — | 1983-02-01 |
| D267649 | Drilling machine | Yoshinari Mori | 1983-01-18 |
| 4350212 | Step feed drilling machine | — | 1982-09-21 |