Patents per Year
Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4796885 | Insert for batting tee and method of repairing a batting tee | — | 1989-01-10 | |
| 4643423 | Pitching target | — | 1987-02-17 | |
| 4592152 | Unlasted shoe | Donald W. Zeuschel | 1986-06-03 | $4,348,000 |
| 4585973 | Travelling wave or like tubes | Ronald L. Finch, Graham C. T. Ball | 1986-04-29 | |
| 4561653 | Portable softball pitching mound | — | 1985-12-31 | |
| 4558257 | Travelling wave tube arrangements | Cyril T. Ball, Peter Tourle | 1985-12-10 |