Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4854588 | Table tennis ball serving device | Joseph E. Newgarden, Gordon E. Lynn | 1989-08-08 |
| 4844458 | Table tennis ball serving device | Joseph E. Newgarden, Gordon E. Lynn | 1989-07-04 |