Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4810435 | Method of making substrate for magnetic recording medium | Hiroshi Hashimoto, Tsutomu Okita | 1989-03-07 |
KK
Koh Kamada
Overall (1989): #86,299 of 140,708Top 65%
1
Patents 1989