Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4377302 | Threaded joint with high gas-leak-tightness for oil and gas well pipe | Fuzimasa Kohyama, Yasusuke Inoue | 1983-03-22 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4377302 | Threaded joint with high gas-leak-tightness for oil and gas well pipe | Fuzimasa Kohyama, Yasusuke Inoue | 1983-03-22 |