Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10149456 | Vertically moving pet bowl apparatus | — | 2018-12-11 |
| 9610680 | Drill bit storage box with an integral gauge | — | 2017-04-04 |
| 5225665 | Ticket originating and processing device for transit vehicle | Arthur S. Zerfahs, Larry E. Zack | 1993-07-06 |
| D333874 | Turnstile cover | — | 1993-03-09 |
| 5089694 | Card reader device having automatic means for clamping the card to be read and for automatically ejecting the card at the end of the card reading and writing operations | Arthur S. Zerfahs, Kirk D. Hoffman | 1992-02-18 |
| 5076413 | Multiple bill escrow and storage apparatus | Jose E. Davila, Kirk D. Hoffman | 1991-12-31 |
| 4457320 | Coin identification unit and coin separator therefor | — | 1984-07-03 |