Issued Patents 2022
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11331703 | Piercer plug and method of manufacturing the same | Yasuyoshi Hidaka, Yasuto Higashida, Yuichi Yamanari, Yuji Yamamoto | 2022-05-17 |
| 11214855 | Piercer plug and method of manufacturing the same | Yasuyoshi Hidaka, Naoya Shirasawa | 2022-01-04 |