Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6694011 | Method and system for reliably detecting voiceband signaling tones | — | 2004-02-17 |
| 6687574 | System and method for surveying utility outages | Frederick Link, Douglas C. Allport, Hamilton Rothrock | 2004-02-03 |