Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5255911 | Tethered ball pitching apparatus and method | George D. Preston, Timothy Kearney, Thomas A. Phelan | 1993-10-26 |
| 5056781 | Tethered ball pitching apparatus | George D. Preston, Timothy Kearney, Thomas A. Phelan | 1991-10-15 |