Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847531 | Waterproofing device for display unit | Katsuya Tsuji | 1989-07-11 |
SF
Shun-ichi Futatsuishi
Overall (1989): #57,983 of 140,708Top 45%
1
Patents 1989