Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5700110 | Method for lining a bent pipe | Takao Kamiyama | 1997-12-23 |
| 5698056 | Method for manufacturing a tubular liner bag | Takao Kamiyama | 1997-12-16 |
| 5598873 | Branch pipe lining method and liner | Takao Kamiyama, Shigeru Endoh | 1997-02-04 |