Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4451041 | Golf club head and a method for manufacturing the same | Keijiro Hayashi, Toshimi Awano, Masayuki Yoshikawa, Takashi Ito | 1984-05-29 |
| 4451042 | Golf club head of carbon fiber reinforced plastic | Keijiro Hayashi, Toshimi Awano, Masayuki Yoshikawa, Takashi Ito | 1984-05-29 |
| 4449707 | Golf club head of carbon fiber reinforced plastic | Keijiro Hayashi, Toshimi Awano, Masayuki Yoshikawa, Takashi Ito | 1984-05-22 |