Granted Patent
Utility
US 5,260,673 · App. 07/933,122
.pi./4 differential encoding for digital cellular mobile systems
Inventor:
Hiep T. Pham
Patented Case
View Patent ↗
Granted: Nov 9, 1993
Filed: Aug 21, 1992
Inventor
Hiep T. Pham
Assignee (at issue)
Hughes Aircraft Company
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.