Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5224742 | Method for cutting off water in pipeline and structure of connection portion in pipeline | Yukio Suzuki, Hisashi Kitajima, Hidehiro Noda | 1993-07-06 |
| 5035539 | Liner for pipeline repair and method for repairing pipelines | Takayuki Kawafuji, Toshio Akesaka | 1991-07-30 |