Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5660398 | Hydraulic sealing device | Kiminobu Terao, Mayumi Takada, Yorinori Kumagai, Takamichi Shimada, Junya Nagai | 1997-08-26 |
| 5632494 | Seal ring and seal device | — | 1997-05-27 |
TO
Toshio Oka
Riken: 1 patents #6 of 22Top 30%
Overall (1997): #21,240 of 185,788Top 15%
2
Patents 1997