Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12104085 | Oil-well metal pipe, and method for producing oil-well metal pipe | Tomoka ABE, Keishi Matsumoto, Mamoru OCHIAI | 2024-10-01 |
| 7757479 | Secondary air supply system for an exhaust port of an engine | Shuji Hirayama, Kenichiro Kakemizu, Teruhide Yamanishi | 2010-07-20 |
| 6009913 | Lubricant surface-treated steel pipe for hydroforming use | Masayasu Kojima, Kenji Ikisima | 2000-01-04 |