Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861029 | Racket frame | — | 1989-08-29 |
| 4811947 | Vibration absorber for a racket | Yoshinori Hariguchi | 1989-03-14 |
MT
Masanori Takatsuka
Overall (1989): #20,348 of 140,708Top 15%
2
Patents 1989