Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7497231 | Female coupling member of pipe coupling | — | 2009-03-03 |
| 6886804 | Socket for pipe coupling | Takahiro Doi | 2005-05-03 |
| 6655498 | Pipe coupling and drain plug for engine oil change | Yoshikazu Ozaki | 2003-12-02 |
| 6398268 | Pipe coupling for female screw | Masaki Takahashi | 2002-06-04 |
| D418397 | Coupling plug with a cap | — | 2000-01-04 |
| 5292156 | Corrugated pipe coupling | Yoshikazu Kobayashi | 1994-03-08 |
| 5261707 | Joint for connection of a corrugated pipe | Naoyuki Kotake, Reichi Makishima, Yoshikazu Kobayashi | 1993-11-16 |
| 5080405 | Corrugated pipe coupling | Yoshikazu Kobayashi | 1992-01-14 |
| 5042152 | Method of manufacturing a socket of a tube coupler | Yoshikazu Kobayashi | 1991-08-27 |
| 4907830 | Fluid coupling | Yoshikazu Kobayashi, Reichi Makishima | 1990-03-13 |
| 4904001 | Fluid coupling | Yoshikazu Kobayashi, Reichi Makishima | 1990-02-27 |
| 4904002 | Fluid coupling | Yoshikazu Kobayashi, Reichi Makishima | 1990-02-27 |
| 4875720 | Fluid coupling | Yoshikazu Kobayashi, Reichi Makishima | 1989-10-24 |