Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8156969 | Underground storage tank with sediment trap | — | 2012-04-17 |
| 5403012 | Board game with transposing pieces | — | 1995-04-04 |
| 5265884 | Magnet toss game | — | 1993-11-30 |
| 4690491 | Building data transmission system | Donald R. Hammer | 1987-09-01 |