Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4811947 | Vibration absorber for a racket | Masanori Takatsuka | 1989-03-14 |
YH
Yoshinori Hariguchi
Overall (1989): #41,277 of 140,708Top 30%
1
Patents 1989