Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6478690 | Multiple material golf club head with a polymer insert face | Richard C. Helmstetter, Ronald K. Hettinger, J. Neil Hall, Kamal Sarkar, Joshua G. Breier +2 more | 2002-11-12 |
| 6328661 | Multiple material golf club head with a polymer insert face | Richard C. Helmstetter, Ronald K. Hettinger, J. Neil Hall, Kamal Sarkar, Joshua G. Breier +2 more | 2001-12-11 |