Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5366261 | Pipe joint with a gasket retainer | Tadahiro Ohmi, Tsutomu Shinohara, Michio Yamaji, Kenji Yamamoto | 1994-11-22 |
| 5308124 | Thrust ring for pipe joints | Michio Yamaji, Naoya Masuda, Tetsuya Kojima | 1994-05-03 |