Issued Patents All Time
Showing 26–50 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5400337 | Method for ATM switch core interface | — | 1995-03-21 |
| 5353282 | Local area network embedded in the communication switch core | Eric J. Dormer | 1994-10-04 |
| 5272696 | ATM plane merging filter for ATM switches and the method thereof | Barry B. Hagglund | 1993-12-21 |
| 5216420 | Matrix sorting network for sorting N inputs onto N outputs | — | 1993-06-01 |
| 5168492 | Rotating-access ATM-STM packet switch | Maged E. Beshai | 1992-12-01 |
| 5144619 | Common memory switch for routing data signals comprising ATM and STM cells | — | 1992-09-01 |
| 5126999 | Method and apparatus for input-buffered asynchronous transfer mode switching | Ian Perryman | 1992-06-30 |
| 5093830 | Self-synchronizing serial transmission of signaling bits in a digital switch | — | 1992-03-03 |
| 5050195 | Narrow range digital clock circuit | — | 1991-09-17 |
| 4970721 | Resource-decoupled architecture for a telecommunications switching system | Andrew L. Aczel, Robert Pfeffer, Frank Mellor | 1990-11-13 |
| 4827475 | Transmitting a digital signal and an additional signal | Wayne D. Grover | 1989-05-02 |
| 4816826 | Digital telephone switching system having a message switch with address translation | Mahmood Sultan, Youssef A. Geadah | 1989-03-28 |
| 4750165 | Method of duplex data transmission using a send-and-wait protocol | Claude Champagne | 1988-06-07 |
| 4733093 | Electronic apparatus with circuit cards and signals optically coupled therebetween | Alan Graves | 1988-03-22 |
| 4698809 | Method and apparatus for the channelized serial transmission of redundantly encoded binary data | — | 1987-10-06 |
| 4539692 | Digital automatic gain control circuit for PCM signals | — | 1985-09-03 |
| 4534041 | Digital circuit for determining the envelope frequency of PCM encoded call progress tones in a telephone system | — | 1985-08-06 |
| 4498171 | Tone source for telephone systems | Andreas L. Aczel | 1985-02-05 |
| 4470139 | Switching network for use in a time division multiplex system | — | 1984-09-04 |
| 4450557 | Switching network for use in a time division multiplex system | — | 1984-05-22 |
| 4446452 | Magnitude comparator circuit and method | — | 1984-05-01 |
| 4439639 | Digital circuit and method for the detection of call progress tones in telephone systems | — | 1984-03-27 |
| 4387457 | Digital conference circuit and method | — | 1983-06-07 |
| 4378526 | Pulse code demodulator for frequency shift keyed data | Claude Champagne | 1983-03-29 |
| 4367456 | PCM and PAM Conversion circuit including signal level variation on the PCM portion of the circuit | — | 1983-01-04 |