Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5781882 | Very low bit rate voice messaging system using asymmetric voice compression processing | Walter L. Davis, Jian-Cheng Huang | 1998-07-14 |
| 5606728 | Method and apparatus for reducing power consumption in a selective call radio | James Michael Keba | 1997-02-25 |
| 5566001 | Method and apparatus for fax messaging in a selective call receiver system using multiple code-book data compression | Ali Saidi, Zaffer S. Merchant | 1996-10-15 |
| 5555446 | Selective call receiver capable of requesting information from a communication system and method therefor | — | 1996-09-10 |
| 5530918 | Method and apparatus for message scheduling in a multi-site data radio communication system | — | 1996-06-25 |
| 5450071 | Method and apparatus for addressing a single message to multiple addresses | Michael J. DeLuca, Gregory O. Snowden, Robert J. Schwendeman | 1995-09-12 |
| 5414419 | Battery saving method for selective call receivers | Robert J. Schwendeman, William J. Kuznicki | 1995-05-09 |
| 5331431 | Method and apparatus for transmitting and receiving encoded data | — | 1994-07-19 |
| 5239677 | Method and apparatus for initiating communication on an assigned frequency | — | 1993-08-24 |
| 5206576 | Battery charger | — | 1993-04-27 |
| 5162790 | Multiple transmitter paging system | — | 1992-11-10 |
| 5153903 | Integrated paging and radiotelephone system having improved paging reliability | Bruce C. Eastmond | 1992-10-06 |
| 5142279 | Acknowledge back paging system having the capability of matching variable length data messages to pager addresses | Francis R. Steel, Lynne A. Steel, Clifford D. Leitch | 1992-08-25 |
| 5128934 | Multiple transmitter message transmission system and method therefor | — | 1992-07-07 |
| 5128665 | Selective call signalling system | Michael J. DeLuca, Gregory O. Snowden, Robert J. Schwendeman | 1992-07-07 |
| 5089813 | Method of super battery saving in a selective call receiver | Michael J. DeLuca, David F. Willard | 1992-02-18 |
| 5054113 | Communication system with bit sampling method in portable receiver for simulcast communication | — | 1991-10-01 |
| 5005014 | System and method for optimally transmitting acknowledge back responses | — | 1991-04-02 |
| 4968966 | High data rate simulcast communication system | Francis R. Steel, Lynne A. Steel | 1990-11-06 |
| 4918437 | High data rate simulcast communication system | Francis R. Steel | 1990-04-17 |
| 4875038 | Frequency division multiplexed acknowledge back paging system | Kazimierz Siwiak, Francis R. Steel | 1989-10-17 |
| 4868560 | Voice paging system providing deferred paging capability | Gary A. Oliwa | 1989-09-19 |
| 4825193 | Acknowledge back pager with adaptive variable transmitter output power | Kazimierz Siwiak, Francis R. Steel | 1989-04-25 |
| 4433214 | Acoustical transducer with a slotted piston suspension | — | 1984-02-21 |