Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6388615 | Micro cell architecture for mobile user tracking communication system | Donald C. D. Chang, Ying Feria, Weizheng Wang, Alan Cha, Ming U. Chang +1 more | 2002-05-14 |
| 6380893 | Ground-based, wavefront-projection beamformer for a stratospheric communications platform | Donald C. D. Chang, Kar W. Yung, Weizheng Wang | 2002-04-30 |
| 6337980 | Multiple satellite mobile communications method and apparatus for hand-held terminals | Donald C. D. Chang, John I. Novak, III, Kar W. Yung, Ming U. Chang, William W. Mayfield | 2002-01-08 |