Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6785553 | Position location of multiple transponding platforms and users using two-way ranging as a calibration reference for GPS | Donald C. D. Chang, Kar W. Yung, David C. H. Cheng, Frank A. Hagen | 2004-08-31 |
| 6763242 | Resource assignment system and method for determining the same | Ying Feria, Donald C. D. Chang, Frank A. Hagen, Alan Cha | 2004-07-13 |
| 6756937 | Stratospheric platforms based mobile communications architecture | Donald C. D. Chang, Ying Feria, Weizheng Wang, Alan Cha, Kar W. Yung +1 more | 2004-06-29 |
| 6751458 | Architecture utilizing frequency reuse in accommodating user-link and feeder-link transmissions | Weizheng Wang, Donald C. D. Chang, Ying Feria, Alan Cha | 2004-06-15 |
| 6725013 | Communication system having frequency reuse in non-blocking manner | Donald C. D. Chang, Weizheng Wang, Ying Feria, Harold A. Rosen, Wah L. Lim | 2004-04-20 |
| 6606307 | Techniques for utilization of bandwidth space assets | Donald C. D. Chang, Kar W. Yung, David C. H. Cheng, Urban A. Von Der Embse, John I. Novak, III +1 more | 2003-08-12 |
| 6567052 | Stratospheric platform system architecture with adjustment of antenna boresight angles | Weizheng Wang, Donald C. D. Chang, Ying Feria | 2003-05-20 |
| 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, John I. Novak, III +1 more | 2002-12-31 |
| 6388615 | Micro cell architecture for mobile user tracking communication system | Donald C. D. Chang, Ying Feria, Weizheng Wang, Alan Cha, Frank A. Hagen +1 more | 2002-05-14 |
| 6337980 | Multiple satellite mobile communications method and apparatus for hand-held terminals | Donald C. D. Chang, John I. Novak, III, Kar W. Yung, Frank A. Hagen, William W. Mayfield | 2002-01-08 |
| 6295440 | Multiple satellite mobile communications method and apparatus for hand-held terminals | Donald C. D. Chang, John I. Novak, III, Kar W. Yung, Frank A. Hagen, William W. Mayfield | 2001-09-25 |