Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5363545 | Method of producing a coupling for oil country tubular goods | Yutaka Hirano, Masayuki Tsuji | 1994-11-15 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5363545 | Method of producing a coupling for oil country tubular goods | Yutaka Hirano, Masayuki Tsuji | 1994-11-15 |