Granted Patent
Utility
US 4,937,535 · App. 07/291,570
Calibration method and programmable phase-gain amplifier
Inventors:
Marcos A. Underwood, Patrick L. McHargue
Patented Case
View Patent ↗
Granted: Jun 26, 1990
Filed: Dec 29, 1988
Inventors
Marcos A. Underwood
Patrick L. McHargue
Assignee (at issue)
Genrad, 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.