Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4417754 | Pipe joint for preventing separation | Tadao Yamaji, Takeshi Kashi | 1983-11-29 |
| 4183561 | Separation-prevented pipe joint which can be assembled from inside pipe | Hiroshi Miyamoto, Tadao Yamaji, Takao Sagara | 1980-01-15 |