Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5827131 | Laminated lightweight inserts for golf club heads | Steven J. Mahaffey | 1998-10-27 |
| 5766094 | Face inserts for golf club heads | Steve Mahaffey | 1998-06-16 |
| 5518242 | Crownless golf club | Steven J. Mahaffey | 1996-05-21 |
| 5419559 | Metal wood with sound dampener bar | Steven J. Mahaffey | 1995-05-30 |
| 5244205 | Adjustable lie angle golf club putter | Joseph F. Baltronis, Walter J. Polaski | 1993-09-14 |
| 5221087 | Metal golf clubs with inserts | Frank Fenton | 1993-06-22 |