Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7283546 | System supporting the dynamic migration of telecommunication subscribers between call services providers | Jean-Francois Gallant | 2007-10-16 |
| 6510219 | Alternate network fallback for IP telephony | Ronald R. Wellard, Kevin Golka | 2003-01-21 |
| 6507648 | Method and apparatus for prioritizing voice and data in a circuit-switched network | Kevin Golka, Lorne A. Porter | 2003-01-14 |
| 6408061 | Interfacing a communication switch to a non-embedded device driver via a virtual device interface | Frank Meijer, Todd Dowser | 2002-06-18 |
| 6330316 | Alternate routing schemes using quality of service information for calls involving unreliable networks | Frank Meijer, Christopher R. Solar | 2001-12-11 |
| 4528664 | Call progress signal monitor and method for telephone systems | Chao-Jan Cheng, Samir E. Ahad | 1985-07-09 |