Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7169056 | Golf club set and golf club shaft set | Takayuki Shiraishi, Masayoshi Kogawa, Yoh Nishizawa | 2007-01-30 |
| 7156749 | Golf club set and golf club shaft set | Takayuki Shiraishi, Masayoshi Kogawa, Yoh Nishizawa | 2007-01-02 |
| 7150684 | Golf club set and golf club shaft set | Takayuki Shiraishi, Masayoshi Kogawa, Yoh Nishizawa | 2006-12-19 |
| 6916251 | Golf club set and golf club shaft set | Takayuki Shiraishi, Masayoshi Kogawa, Yoh Nishizawa | 2005-07-12 |
| 6572489 | Golf club head | Masahiko Miyamoto, Yoh Nishizawa | 2003-06-03 |
| 6546802 | Evaluation method of golf club and golf club | Takayuki Shiraishi, Masayoshi Kogawa, Yoh Nishizawa | 2003-04-15 |