Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10323779 | Pipe coupling structure | Satoru Koyanagi | 2019-06-18 |
| 9470313 | Metal seal ring | Satoru Koyanagi | 2016-10-18 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10323779 | Pipe coupling structure | Satoru Koyanagi | 2019-06-18 |
| 9470313 | Metal seal ring | Satoru Koyanagi | 2016-10-18 |