Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5096332 | Method for water leakage prevention in pipeline and liner for water leakage prevention | — | 1992-03-17 |
| 5035539 | Liner for pipeline repair and method for repairing pipelines | Toshio Akesaka, Sinkiti Ooka | 1991-07-30 |