Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5311582 | Integrated cocot and regulated paystation telephone system | Richard K. Shipman, Thomas D. Young, Stephen H. Strode | 1994-05-10 |
| 5216707 | Circuit for firing paystation coin relay using power derived from telephone line tip/ring voltage | Richard K. Shipman, Thomas D. Young, Stephen H. Strode | 1993-06-01 |
| 5187739 | Answer supervision circuit for paystation telephone with non-muted microphone | Richard K. Shipman, Thomas D. Young, Stephen H. Strode | 1993-02-16 |