Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4630849 | Oil well pipe joint | Kunihiro Fukui, Minoru Nishihara, Yoshiyasu Morita, Hisakazu Kawashima | 1986-12-23 |
| 4206060 | Bolt and nut unit coated with lubricant | Hideo Yamamoto, Hidehiro Mukai, Hisao Nakayama | 1980-06-03 |