Granted Patent
Utility
US 4,814,720 · App. 07/195,073
Low noise crossed-field amplifier
Inventors:
Guilford R. MacPhail, Chris L. Wheeland, Edward M. Doyle
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: May 17, 1988
Inventors
Guilford R. MacPhail
Chris L. Wheeland
Edward M. Doyle
Assignee (at issue)
Guilford R. MacPhail
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.