| Patent | Date |
|---|
Alphanumeric message composing method using telephone keypad
Grant 6,137,867 - Perera , et al. October 24, 2 | 2000-10-24 |
System and method for allocating frequency channels in a two-way messaging network
Grant 6,035,207 - Wang , et al. March 7, 2 | 2000-03-07 |
Method and apparatus for improving the reliability of communicating a message from a portable subscriber unit to a base receiver in a two-way radio messaging system
Grant 5,905,945 - Hill , et al. May 18, 1 | 1999-05-18 |
System and method for allocating frequency channels in a two-way messaging network
Grant 5,737,691 - Wang , et al. April 7, 1 | 1998-04-07 |
Data communication receiver having variable length message carry-on
Grant 5,617,083 - Schwendeman , et al. April 1, 1 | 1997-04-01 |
Messaging system and method having roaming capability and controlled group messaging
Grant 5,600,312 - Willard , et al. February 4, 1 | 1997-02-04 |
Method and apparatus for synchronizing to a synchronous selective call signal
Grant 5,555,183 - Willard , et al. September 10, 1 | 1996-09-10 |
Method and apparatus for adaptively selecting a communication strategy in a selective call radio communication system
Grant 5,546,411 - Leitch , et al. August 13, 1 | 1996-08-13 |
Method and apparatus for addressing a single message to multiple addresses
Grant 5,450,071 - DeLuca , et al. * September 12, 1 | 1995-09-12 |
Method and apparatus for switched diversity reception of a radio signal
Grant 5,446,922 - Siwiak , et al. August 29, 1 | 1995-08-29 |
Method and apparatus for equalizing battery life in a selective call communication system
Grant 5,440,299 - Schwendeman August 8, 1 | 1995-08-08 |
Method and apparatus for sharing signaling formats in a communication channel
Grant 5,423,057 - Kuznicki , et al. June 6, 1 | 1995-06-06 |
Calendar driven selective call messaging system and operating method
Grant 5,416,473 - Dulaney, III , et al. May 16, 1 | 1995-05-16 |
Method and apparatus for correcting an angle of an optical image for improving the efficiency of facsimile encoding of the image
Grant 5,410,417 - Kuznicki , et al. April 25, 1 | 1995-04-25 |
Reliable message delivery system
Grant 5,396,537 - Schwendeman March 7, 1 | 1995-03-07 |
Satellite based acknowledge-back paging system
Grant 5,392,451 - Schwendeman , et al. February 21, 1 | 1995-02-21 |
Communication system capable of reassigning radio receivers
Grant 5,371,899 - Kuznicki , et al. December 6, 1 | 1994-12-06 |
Synchronous selective signalling system
Grant 5,325,088 - Willard , et al. June 28, 1 | 1994-06-28 |
Method and apparatus for dual-channel diversity reception of a radio signal
Grant 5,325,403 - Siwiak , et al. June 28, 1 | 1994-06-28 |
Reliable message communication system
Grant 5,315,635 - Kane , et al. May 24, 1 | 1994-05-24 |
Satellite based global paging system
Grant 5,301,354 - Schwendeman , et al. * April 5, 1 | 1994-04-05 |
Sensitivity indicator for a radio receiver and method therefor
Grant 5,289,178 - Schwendeman February 22, 1 | 1994-02-22 |
Satellite selective call signalling system
Grant 5,257,019 - Schwendeman , et al. October 26, 1 | 1993-10-26 |
"Selective call receiver"
Grant 5,252,963 - Snowden , et al. October 12, 1 | 1993-10-12 |
Satellite based global paging system
Grant 5,239,670 - Schwendeman , et al. August 24, 1 | 1993-08-24 |
Dual mode receiver having battery saving capability
Grant 5,239,306 - Siwiak , et al. August 24, 1 | 1993-08-24 |
Time division multiplexed selective call system
Grant 5,168,493 - Nelson , et al. December 1, 1 | 1992-12-01 |
Selective call signalling system
Grant 5,128,665 - DeLuca , et al. July 7, 1 | 1992-07-07 |
Mixed modulation level communication system
Grant 5,051,993 - DeLuca , et al. September 24, 1 | 1991-09-24 |
Selective call system with message rebroadcasting over another selective call system
Grant 5,047,763 - Kuznicki , et al. September 10, 1 | 1991-09-10 |
Satellite based simulcast paging system
Grant 5,010,317 - Schwendeman , et al. April 23, 1 | 1991-04-23 |
Active signalling transmitter control
Grant 4,972,439 - Kuznicki , et al. November 20, 1 | 1990-11-20 |
Animated data display interleaving
Grant 4,951,039 - Schwendeman , et al. August 21, 1 | 1990-08-21 |
Multiple frequency message system
Grant 4,914,649 - Schwendeman , et al. April 3, 1 | 1990-04-03 |
High Capacity Paging System Employing Subaudible Tones
Grant 3,798,545 - Schultz , et al. March 19, 1 | 1974-03-19 |
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