Granted Patent
Utility
US 5,130,601 · App. 07/493,497
Quick warm-up cathode heater for high average power magnetrons
Inventors:
Christopher M. Walker, Geoffrey Thornber, Robert C. English
Patented Case
View Patent ↗
Granted: Jul 14, 1992
Filed: Mar 14, 1990
Inventors
Christopher M. Walker
Geoffrey Thornber
Robert C. English
Assignee (at issue)
Litton Systems, 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.