Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6056014 | Drainage collective pipe joint | Yozo Kako, Toshihiko Kawamura | 2000-05-02 |
| 5887913 | Pipe joint structure | Yozo Kako | 1999-03-30 |
| 5415438 | Drainage vertical tube joint | Toshihiko Kawamura | 1995-05-16 |
| 4298206 | Flexible packing for sealing pipeline joints | — | 1981-11-03 |
| 4252348 | Flanged pipe joints | — | 1981-02-24 |
| 4229923 | Method of connecting pipes and flanged pipe joints used therein | — | 1980-10-28 |
| 4181330 | Horn shaped multi-inlet pipe fitting | — | 1980-01-01 |