Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5944621 | Hollow golf ball | Hiroyuki Tsujinaka, Minoru Tsujinaka, legal representative, Kinuko Tsujinaka, legal representative, Kazuo Hochi, Keiji Moriyama +1 more | 1999-08-31 |
| 5836830 | Golf club head | Masahide Onuki, Kazuo Asano | 1998-11-17 |