Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5202157 | Method for lining internal surfaces of pipelines | Takaharu Tomoyasu | 1993-04-13 |
| 4958128 | Method of examining an inside surface-coated metallic pipe and apparatus | Takaharu Tomoyasu | 1990-09-18 |