Granted Patent
Utility
US 5,423,081 · App. 08/106,730
Cellular power amplifier power level control circuitry
Inventors:
Al Thiele, Sai Kwok, Khalid Karimullah
Patented Case
View Patent ↗
Granted: Jun 6, 1995
Filed: Aug 16, 1993
Inventors
Al Thiele
Sai Kwok
Khalid Karimullah
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.