Issued Patents All Time
Showing 26–50 of 50 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6778509 | MAC layer protocol for a satellite based packet switched services | Channasandra Ravishankar, Mahesh Kamath, Abheek Saha, James Hobza | 2004-08-17 |
| 6711398 | Radio signal broadcast system and method | Farzad Talaie, John G. Himes, John L. Rotondo, Richard H. Johnson | 2004-03-23 |
| 6650895 | In-call DTMF transport for geostationary mobile satellite communication system | Channasandra Ravishankar, David Roos, Chandra Joshi, James Hobza, Prabir Datta +1 more | 2003-11-18 |
| 6515617 | Method and system for position determination using geostationary earth orbit satellite | Stephanie Demers, Michael Parr, Dave Roos | 2003-02-04 |
| 6516065 | Method for implementing ciphered communication for single-hop terminal-to-terminal calls in a mobile satellite system | Chandra Joshi, Chi-Jiun Su | 2003-02-04 |
| 6438386 | Immediate channel assignment in a wireless system | Chandra Joshi, Gerard Stelzer, Mohammad Soleimani, Prabir Datta, Xiaoping He | 2002-08-20 |
| 6400319 | Communication network intialization apparatus and method for fast GPS-based positioning | Michael Warren Castelloe, Allan Lamkin, Dave Roos | 2002-06-04 |
| 6385447 | Signaling maintenance for discontinuous information communications | Mohammad Soleimani, Moe Rahnema, Jean-Aicard Fabien, David Roos, Michael Parr | 2002-05-07 |
| 6353738 | Method for implementing a terminal-to-terminal call with an optimal use of radio resources in a mobile satellite system | Chandra Joshi, Chi-Jiun Su | 2002-03-05 |
| 6332069 | Apparatus and method for grouping carriers to minimize the occurrence of call blocking in a satellite-based communications network | Wei Zhao, Steven L. Arnold, Dave Roos | 2001-12-18 |
| 6314290 | Mobile satellite system and method for implementing a single-hop terminal-to-terminal call | Chandra Joshi, Chi-Jiun Su, Dave Roos | 2001-11-06 |
| 6289482 | Error and flow control in a satellite communications system | Chandra Joshi, Xiaoping He, Prabir Datta | 2001-09-11 |
| 6282178 | Paging reception assurance in a multiply registered wireless transceiver | Xiaoping He | 2001-08-28 |
| 6278876 | System and method for implementing terminal to terminal connections via a geosynchronous earth orbit satellite | Chandra Joshi, Neeraj Tewari, Gerard Stelzer, David Roos, Chi-Jiun Su | 2001-08-21 |
| 6249677 | Apparatus and method for delivering key information of a channel request message from a user terminal to a network | Chandra Joshi, Stephanie Demers | 2001-06-19 |
| 6233451 | Spot beam selection in a mobile satellite communication system | Chandra Joshi, Michael Parr, Zhengping Gao, Stephanie Demers | 2001-05-15 |
| 6167279 | Method and system for supporting PACS using a GSM mobile switching center | Li Fung Chang, Edward Lipper, Pertti S. Lukander, Vijay K. Varma | 2000-12-26 |
| 6067045 | Communication network initialization apparatus and method for fast GPS-based positioning | Michael Warren Castelloe, Allan Lamkin, Dave Roos | 2000-05-23 |
| 5956638 | Method for unlicensed band port to autonomously determine interference threshold and power level | Li Fung Chang | 1999-09-21 |
| 5822681 | Method for assigning band port channels in an unlicensed personal communications system | Li Fung Chang, Ashok Ranade, Nelson Sollenberger | 1998-10-13 |
| 5475677 | Compatible licensed and unlicensed band portable handset unit for TDMA wireless communications system | Hamilton W. Arnold, Li Fung Chang, Nelson Sollenberger, Robert Ziegler | 1995-12-12 |
| 5416452 | Mode diversity coupler for vertical polarization | Adedokun W. Sule-Koiki | 1995-05-16 |
| 4994819 | Pattern diversity in a microwave digital radio system utilizing a single horn reflector antenna | — | 1991-02-19 |
| 4419671 | Small dual frequency band hybrid mode feed | — | 1983-12-06 |
| 4246584 | Hybrid mode waveguide or feedhorn antenna | — | 1981-01-20 |