Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10579331 | Method and apparatus for controlling an average fill level of an asynchronous first-in-first-out, FIFO | — | 2020-03-03 |
| 5311582 | Integrated cocot and regulated paystation telephone system | Marcus K. Davenport, Richard K. Shipman, Thomas D. Young | 1994-05-10 |
| 5216707 | Circuit for firing paystation coin relay using power derived from telephone line tip/ring voltage | Marcus K. Davenport, Richard K. Shipman, Thomas D. Young | 1993-06-01 |
| 5187739 | Answer supervision circuit for paystation telephone with non-muted microphone | Marcus K. Davenport, Richard K. Shipman, Thomas D. Young | 1993-02-16 |