Issued Patents 2022
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11446406 | Photocatalytic device and fluid cleaning apparatus having the device | Teruo Watanabe, Hidemitsu Watanabe, Hiroyuki Watanabe, Takafumi Watanabe | 2022-09-20 |
| 11255134 | Threaded joint for oil country tubular goods | — | 2022-02-22 |