Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8186648 | Method of shutting off conduit and pipe conduit shutoff apparatus | Atsushi Sakai | 2012-05-29 |
| 6773040 | Spacer-less type pipe joint and packing ring used for the same | Kikuo Saito | 2004-08-10 |
| 6659511 | Flexible fluid-transport pipe joint apparatus | Hideki Yoneyama | 2003-12-09 |
| 6019396 | Pipe connecting apparatus | Kikuo Saito, Yasushi Shimonaka, Hideki Yoneyama | 2000-02-01 |