Issued Patents All Time
Showing 101–103 of 103 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6367321 | Test method on the strength of ceramic engine-valves and testing device for the same | — | 2002-04-09 |
| 5884898 | Butterfly valve for hot fluid | — | 1999-03-23 |
| 5273009 | Silicon-nitride-inserted piston | Tadao Ozawa | 1993-12-28 |