Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5176869 | Method of manufacturing an inner lined pipe | Hiroshi Okamoto, Takaaki Kawano, Toshiyuki Tsujiuchi | 1993-01-05 |
| 5098628 | Centrifugal molding method for composite pipe having a resin concrete layer | Hiroshi Okamoto, Takaaki Kawano, Toshiyuki Tsujiuchi | 1992-03-24 |