Granted Patent
Utility
US 6,553,225 · App. 09/417,592
Apparatus and method for positioning single-offset zones in a spot beam coverage area to maximize call duration in a satellite-based communications network
Inventors:
Wei Zhao, David Roos
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Oct 14, 1999
Inventors
Wei Zhao
David Roos
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.