Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5016882 | Metallic golf club head | Toyohiko Tadokoro | 1991-05-21 |
| 4964640 | Iron club head for golf | Tatsuo Nakanishi, Toyohiko Tadokoro | 1990-10-23 |
| 4928972 | Iron club head for golf | Tatsuo Nakanishi, Toyohiko Tadokoro | 1990-05-29 |
| 4884812 | Golf club head | Yoichi Nagasaki, Itsushi Nagamoto, Toyohiko Tadokoro | 1989-12-05 |
| 4867458 | Golf club head | Noburoh Sumikawa | 1989-09-19 |
| 4848747 | Set of golf clubs | Toyohiko Tadokoro | 1989-07-18 |
| 4798383 | Golf club head | Yoichi Nagasaki, Itsushi Nagamoto, Toyohiko Tadokoro | 1989-01-17 |
| 4792139 | Golf club head | Yoichi Nagasaki, Itsushi Nagamoto, Toyohiko Tadokoro | 1988-12-20 |
| 4740345 | Method for producing an iron golf club head | Yoichi Nagasaki, Toyohiko Tadokoro, Tatsuo Nakanishi | 1988-04-26 |