Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6430819 | Sport measuring apparatus | Frederick J. Grewen | 2002-08-13 |
| 5935025 | Court boundary tape | — | 1999-08-10 |
| 5928095 | Court boundary tape and measuring apparatus therefor | — | 1999-07-27 |
| 5800297 | Court boundary tape | — | 1998-09-01 |