Granted Patent
Utility
US 4,806,853 · App. 07/148,244
High accuracy frequency modulation waveform tester
Inventors:
Herman J. Fleischer, John C. Bracken
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Jan 25, 1988
Inventors
Herman J. Fleischer
John C. Bracken
Assignee (at issue)
Unisys Corporation
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.