Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5638407 | Inversion prevention device | Keiji Hatanaka | 1997-06-10 |
YS
Yoshiyuki Shirasaki
Overall (1997): #55,252 of 185,788Top 30%
1
Patents 1997