Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5219614 | Method for lining pipe inner surface in multibranch piping | Masato Kawazoe | 1993-06-15 |
| 5202157 | Method for lining internal surfaces of pipelines | Kanji Miyamoto | 1993-04-13 |
| 4958128 | Method of examining an inside surface-coated metallic pipe and apparatus | Kanji Miyamoto | 1990-09-18 |
| 4749494 | Treatment of waste water by the activated sludge process | Yuzaburo Kumagai, Shiro Honda, Hikoyoshi Kanayama | 1988-06-07 |