Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4799970 | Surface treatment method for improving corrosion resistance of ferrous sintered parts | Satoshi Fujii | 1989-01-24 |
TK
Takashi Koiso
Overall (1989): #53,185 of 140,708Top 40%
1
Patents 1989