Issued Patents All Time
Showing 51–69 of 69 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7130412 | Telecommunication line driver having synthesized output impedance derived from output current sensing circuit | Robert E. Gewin, Christopher J. Foran | 2006-10-31 |
| 7116256 | Pulse shaping apparatus and method | Paul C. Ferguson | 2006-10-03 |
| 6975706 | Capacitance measurement-based mechanism for locating open telecommunication line fault | Fred Chu | 2005-12-13 |
| 6937095 | Efficient, switched linear signal driver | — | 2005-08-30 |
| 6888896 | Method and apparatus for reducing flux imbalance signal distortion in a data communications system | Richard L. Goodson, Curtis W. Dodd | 2005-05-03 |
| 6757383 | Compact cable balance network for echo-cancelling, and method for optimizing transhybrid loss and method and apparatus for circuit simulation | — | 2004-06-29 |
| 6647115 | Method and apparatus for an improved analog echo canceller | — | 2003-11-11 |
| 6580327 | Electronically controllable slope equalizer | Jared D. Cress | 2003-06-17 |
| 6542604 | Scaled impedance replica for echo attenuation in digital transmission systems | Thomas Blon, Martin Gröpl, Michael Moyal | 2003-04-01 |
| 6437574 | Auxiliary battery test and alarm system for telecommunication equipment | Steven M. Robinson, Ralph R. Boudreaux, Jr., John S. McGary, James M. Glass, III | 2002-08-20 |
| 6359505 | Complementary pair-configured telecommunication line driver having synthesized output impedance | — | 2002-03-19 |
| RE36228 | Call progress capability for a switched channel data service unit | Charles R. Eberle, Jr. | 1999-06-15 |
| 5856758 | Low distortion driver employing positive feedback for reducing power loss in output impedance that effectively matches the impedance of driven line | Robert E. Gewin | 1999-01-05 |
| 5748637 | DTMF signaling on four-wire switched 56 KBPS lines | Donald C. Panek, Jr. | 1998-05-05 |
| 5457690 | DTMF Signaling on four-wire switched 56 Kbps Lines | Donald C. Panek, Jr. | 1995-10-10 |
| 5060259 | Call progress capability for a switched channel data service unit | Charles R. Eberle, Jr. | 1991-10-22 |
| 5014307 | Method and apparatus for echo canceler disablement | Charles R. Eberle, Jr. | 1991-05-07 |
| 4995076 | Call progress capability for a switched channel data service unit | Charles R. Eberle, Jr. | 1991-02-19 |
| 4454477 | Loop current detector with threshold setting impedance | — | 1984-06-12 |