Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874636 | Method for preparing magnetic recording medium | Tsutomu Okita, Hiroshi Ogawa | 1989-10-17 |
HN
Hiromi Nakahara
Overall (1989): #104,616 of 140,708Top 75%
1
Patents 1989