Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6185297 | Low power dialer | Patrick H. Casselman, Marshall William Pharoah, Valentin Purits, John R. Zabel | 2001-02-06 |
| 6137276 | Onhook telecom power supply regulator mode | — | 2000-10-24 |