Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7339520 | Phased array terminal for equatorial satellite constellations | Donald C. D. Chang, William W. Mayfield, Frank Taormina | 2008-03-04 |
| 7027769 | GEO stationary communications system with minimal delay | Harold A. Rosen, Donald C. D. Chang, Ming U. Chang, Weizheng Wang, Wah L. Lim | 2006-04-11 |
| 7016646 | Communication system employing reuse of satellite spectrum for terrestrial communication | William W. Mayfield, Donald C. D. Chang | 2006-03-21 |
| 6963548 | Coherent synchronization of code division multiple access signals | Donald C. D. Chang, Kar W. Yung, David C. H. Cheng, Frank A. Hagen, Ming U. Chang | 2005-11-08 |
| 6888499 | Signal processing circuit for communicating with a modular mobile terminal and method therefor | Donald C. D. Chang, Urban A. Von Der Embse, Kar W. Yung | 2005-05-03 |
| 6807397 | Method for identifying growth limits of handheld services for mobile satellite communications | Donald C. D. Chang, Kar W. Yung, David C. H. Cheng, Urban A. Von Der Embse, Frank Taormina +1 more | 2004-10-19 |
| 6791495 | Modular mobile terminal for satellite communication | Donald C. D. Chang, Urban A. Von Der Embse, Kar W. Yung | 2004-09-14 |
| 6766987 | Satellite system and method of deploying same | Frank Taormina, Donald C. D. Chang, Kar W. Yung, David C. H. Cheng, William W. Mayfield +1 more | 2004-07-27 |
| 6735437 | Communication system employing reuse of satellite spectrum for terrestrial communication | William W. Mayfield, Donald C. D. Chang | 2004-05-11 |
| 6667715 | Signal processing circuit for communicating with a modular mobile satellite terminal and method therefor | Donald C. D. Chang, Urban A. Von Der Embse, Kar W. Yung | 2003-12-23 |
| 6606307 | Techniques for utilization of bandwidth space assets | Donald C. D. Chang, Kar W. Yung, David C. H. Cheng, Urban A. Von Der Embse, 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, Kar W. Yung, Robert R. Holden | 2003-05-13 |
| 6501941 | Method for identifying growth limits of handheld services for mobile satellite communications | Donald C. D. Chang, Kar W. Yung, David C. H. Cheng, Urban A. Von Der Embse, Frank Taormina +1 more | 2002-12-31 |
| 6496146 | Modular mobile terminal for satellite communication | Donald C. D. Chang, Urban A. Von Der Embse, Kar W. Yung | 2002-12-17 |
| 6460808 | Satellite system and method of deploying same | Frank Taormina, Donald C. D. Chang, Kar W. Yung, David C. H. Cheng, William W. Mayfield +1 more | 2002-10-08 |
| 6377208 | Method and system for determining a position of a transceiver unit utilizing two-way ranging in a polystatic satellite configuration | Donald C. D. Chang, Kar W. Yung, Robert R. Holden | 2002-04-23 |
| 6340947 | Method and system for determining a position of a transceiver unit utilizing two-way ranging in a polystatic satellite configuration including a ground radar | Donald C. D. Chang, Kar W. Yung, William Goliff | 2002-01-22 |
| 6337980 | Multiple satellite mobile communications method and apparatus for hand-held terminals | Donald C. D. Chang, Kar W. Yung, Frank A. Hagen, Ming U. Chang, William W. Mayfield | 2002-01-08 |
| 6336612 | Satellite system and method of deploying same | Frank Taormina, Donald C. D. Chang, Kar W. Yung, David C. H. Cheng, William W. Mayfield +1 more | 2002-01-08 |
| 6295440 | Multiple satellite mobile communications method and apparatus for hand-held terminals | Donald C. D. Chang, Kar W. Yung, Frank A. Hagen, Ming U. Chang, William W. Mayfield | 2001-09-25 |
| 6257526 | Satellite system and method of deploying same | Frank Taormina, Donald C. D. Chang, Kar W. Yung, David C. H. Cheng, William W. Mayfield +1 more | 2001-07-10 |