Issued Patents All Time
Showing 1–25 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6426980 | Method and apparatus for communicating a call | Paul E. Gorday, Clifford D. Leitch, Thomas V. D'Amico | 2002-07-30 |
| 5956640 | Messaging system providing flexible roaming and method therefor | Eric Thomas Eaton, David F. Willard | 1999-09-21 |
| 5940756 | Method for transmitting paging communication on a cellular communication system | Salvador Sibecas, Eric Thomas Eaton | 1999-08-17 |
| 5920840 | Communication system and method using a speaker dependent time-scaling technique | Sunil Satyamurti, Clifford D. Leitch, Robert J. Schwendeman, Kazimierz Siwiak | 1999-07-06 |
| 5757281 | Multiple acknowledge-back response data paging | Robert J. Schwendeman | 1998-05-26 |
| 5710639 | Scan line compressed facsimile communication system | Robert J. Schwendeman, Gregg Rasor | 1998-01-20 |
| 5689805 | Communication system and method providing minimum message transmission delay | Douglas I. Ayerst, Robert J. Schwendeman | 1997-11-18 |
| 5689440 | Voice compression method and apparatus in a communication system | Clifford D. Leitch, Robert J. Schwendeman, Kazimierz Siwiak, Sunil Satyamurti | 1997-11-18 |
| 5668923 | Voice messaging system and method making efficient use of orthogonal modulation components | Kazimierz Siwiak, Sunil Satyamurti | 1997-09-16 |
| 5627528 | Selective call receiver capable of suspending acknowledge-back signals and method therefor | — | 1997-05-06 |
| 5625351 | Messaging system having roaming capability | David F. Willard, Barbara Diaz Laflin, Mark H. Aronson, Eric Thomas Eaton | 1997-04-29 |
| 5555183 | Method and apparatus for synchronizing to a synchronous selective call signal | David F. Willard, Robert J. Schwendeman, Michael J. DeLuca | 1996-09-10 |
| 5423057 | Method and apparatus for sharing signaling formats in a communication channel | Robert J. Schwendeman | 1995-06-06 |
| 5414419 | Battery saving method for selective call receivers | Robert J. Schwendeman, Leon Jasinski | 1995-05-09 |
| 5410417 | Method and apparatus for correcting an angle of an optical image for improving the efficiency of facsimile encoding of the image | Robert J. Schwendeman | 1995-04-25 |
| 5410749 | Radio communication device having a microstrip antenna with integral receiver systems | Kazimierz Siwiak | 1995-04-25 |
| 5404569 | Satellite based acknowledge-back paging system | Robert J. Schwendeman | 1995-04-04 |
| 5371899 | Communication system capable of reassigning radio receivers | Robert J. Schwendeman | 1994-12-06 |
| 5325088 | Synchronous selective signalling system | David F. Willard, Robert J. Schwendeman, Morris A. Moore, Michael J. DeLuca | 1994-06-28 |
| 5311516 | Paging system using message fragmentation to redistribute traffic | David F. Willard | 1994-05-10 |
| 5301354 | Satellite based global paging system | Robert J. Schwendeman | 1994-04-05 |
| 5283832 | Paging message encryption | Robert K. Lockhart, Jr. | 1994-02-01 |
| 5282205 | Data communication terminal providing variable length message carry-on and method therefor | — | 1994-01-25 |
| 5239670 | Satellite based global paging system | Robert J. Schwendeman | 1993-08-24 |
| 5047763 | Selective call system with message rebroadcasting over another selective call system | Robert J. Schwendeman | 1991-09-10 |