Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10053342 | Chain block | Kazumitsu Ishikawa, Kosuke Kosuga | 2018-08-21 |
| 9802799 | Chain block | Kazumitsu Ishikawa, Kosuke Kosuga | 2017-10-31 |
| D704411 | Chain hoist | Kazumitsu Ishikawa, Kosuke Kosuga, Shigeo Terai | 2014-05-06 |
| D704412 | Chain hoist | Kazumitsu Ishikawa, Kosuke Kosuga, Shigeo Terai | 2014-05-06 |
| D704413 | Chain hoist | Kazumitsu Ishikawa, Kosuke Kosuga, Shigeo Terai | 2014-05-06 |
| D704414 | Chain hoist | Kazumitsu Ishikawa, Kosuke Kosuga, Shigeo Terai | 2014-05-06 |
| D704415 | Chain hoist | Kazumitsu Ishikawa, Kosuke Kosuga, Shigeo Terai | 2014-05-06 |