Issued Patents All Time
Showing 1–25 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8223733 | Multi-platform wireless communication system for a variety of different user types | Frank A. Hagen, Donald C. D. Chang | 2012-07-17 |
| 7215954 | Resource allocation method for multi-platform communication system | Frank A. Hagen, Donald C. D. Chang | 2007-05-08 |
| 7198230 | Method and system for maximizing satellite constellation coverage | Donald C. D. Chang | 2007-04-03 |
| 7089000 | Multi-node wireless communication system with multiple transponding platforms | Ming U. Chang, Frank A. Hagen, Donald C. D. Chang | 2006-08-08 |
| 7068733 | Sampling technique for digital beam former | Donald C. D. Chang, Urban A. Von Der Embse | 2006-06-27 |
| 7046718 | Coherent phase synchronous code division multiple access communications from multiple transponder platforms | Frank A. Hagen, Ying Feria, Donald C. D. Chang | 2006-05-16 |
| 6990314 | Multi-node point-to-point satellite communication system employing multiple geo satellites | Frank A. Hagen, Richard Flammang, Donald C. D. Chang | 2006-01-24 |
| 6963548 | Coherent synchronization of code division multiple access signals | Donald C. D. Chang, David C. H. Cheng, Frank A. Hagen, Ming U. Chang, John I. Novak, III | 2005-11-08 |
| 6920309 | User positioning technique for multi-platform communication system | Frank A. Hagen, Donald C. D. Chang | 2005-07-19 |
| 6914557 | Micro cell architecture for mobile user tracking communication system | Donald C. D. Chang, Ying Feria, Weizheng Wang, Alan Cha, Ming U. Chang +1 more | 2005-07-05 |
| 6909875 | Multi-platform wireless communication system for a variety of different user types | Frank A. Hagen, Donald C. D. Chang | 2005-06-21 |
| 6888499 | Signal processing circuit for communicating with a modular mobile terminal and method therefor | Donald C. D. Chang, Urban A. Von Der Embse, John I. Novak, III | 2005-05-03 |
| 6868269 | Integrating coverage areas of multiple transponder platforms | Frank A. Hagen, Ying Feria, Weizheng Wang, Donald C. D. Chang | 2005-03-15 |
| 6807397 | Method for identifying growth limits of handheld services for mobile satellite communications | Donald C. D. Chang, David C. H. Cheng, Urban A. Von Der Embse, John I. Novak, III, Frank Taormina +1 more | 2004-10-19 |
| 6791495 | Modular mobile terminal for satellite communication | Donald C. D. Chang, Urban A. Von Der Embse, John I. Novak, III | 2004-09-14 |
| 6785553 | Position location of multiple transponding platforms and users using two-way ranging as a calibration reference for GPS | Donald C. D. Chang, David C. H. Cheng, Ming U. Chang, Frank A. Hagen | 2004-08-31 |
| 6766987 | Satellite system and method of deploying same | Frank Taormina, Donald C. D. Chang, David C. H. Cheng, William W. Mayfield, John I. Novak, III +1 more | 2004-07-27 |
| 6762718 | Wavefront-projection beamformer | Donald C. D. Chang, Frank A. Hagen, Weizheng Wang | 2004-07-13 |
| 6756937 | Stratospheric platforms based mobile communications architecture | Donald C. D. Chang, Ming U. Chang, Ying Feria, Weizheng Wang, Alan Cha +1 more | 2004-06-29 |
| 6757546 | Synchronization method and apparatus for multi-platform communication system | Frank A. Hagen, Ying Feria, Donald C. D. Chang | 2004-06-29 |
| 6667715 | Signal processing circuit for communicating with a modular mobile satellite terminal and method therefor | Donald C. D. Chang, Urban A. Von Der Embse, John I. Novak, III | 2003-12-23 |
| 6643268 | Method for re-routing signals in a switch network | David C. H. Cheng, Thu-Tam Trinh-Perches, Kenneth N. Gibson | 2003-11-04 |
| 6606307 | Techniques for utilization of bandwidth space assets | Donald C. D. Chang, David C. H. Cheng, Urban A. Von Der Embse, John I. Novak, III, Frank Taormina +1 more | 2003-08-12 |
| 6563457 | Method and system for determining a position of an object using two-way ranging in a polystatic satellite configuration | Donald C. D. Chang, John I. Novak, III, Robert R. Holden | 2003-05-13 |
| 6507314 | Ground-based, wavefront-projection beamformer for a stratospheric communications platform | Donald C. D. Chang, Frank A. Hagen, Weizheng Wang | 2003-01-14 |