Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4522397 | Filled shell bowling ball | Charles Miller | 1985-06-11 |
| 4328967 | Lightweight bowling ball | Charles Miller | 1982-05-11 |
| 4309377 | Polymer alloy bowling ball | Charles Miller | 1982-01-05 |
| 4253665 | Polymer alloy bowling ball | Charles Miller | 1981-03-03 |