Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D304851 | Ball retriever head assembly | Donald J. Allison | 1989-11-28 |
| 4744593 | Golf ball retriever | Donald J. Allison | 1988-05-17 |
| 4669770 | Golf ball retriever | Donald J. Allison | 1987-06-02 |