Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6631739 | Pipe liner bag everting nozzle and pipe lining method | Takao Kamiyama, Shigeru Endoh, Hiroyuki Aoki | 2003-10-14 |
| 6562426 | Pipe liner bag | Takao Kamiyama, Shigeru Endoh, Hiroyuki Aoki | 2003-05-13 |