Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887950 | Waterproof nut | Kiyoshi Sakayori, Yozo Ishida, Toshikazu Shinogaya, Yuzo Ishizuka | 1989-12-19 |
SI
Shinichi Iwasaki
Overall (1989): #57,730 of 140,708Top 45%
1
Patents 1989