Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4296954 | Pipe coupling and pipe joint connection | Kiyoshi Fujimaki, Yoshiaki Bando, Tutomu Hashimoto | 1981-10-27 |
| 4263249 | Method for producing reinforced plastic tubular body having annular grooves, and mold therefor | Masakatu Mayumi, Kenji Mitooka, Sigeharu Fujiwara | 1981-04-21 |