Granted Patent
Utility
US 5,933,421 · App. 08/796,584
Method for frequency division duplex communications
Inventors:
Siavash Alamouti, Eduardo Casas, Michael Hirano, Elliott Hoole, Mary Jesse, David G. Michelson, Patrick Poon, Gregory J. Veintimilla, Hongliang Zhang
Patented Case
View Patent ↗
Granted: Aug 3, 1999
Filed: Feb 6, 1997
Inventors
Siavash Alamouti
Eduardo Casas
Michael Hirano
Elliott Hoole
Mary Jesse
David G. Michelson
Patrick Poon
Gregory J. Veintimilla
Hongliang Zhang
Assignee (at issue)
AT&T WIRELESS SERVICES, INC.
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.