Granted Patent
Utility
US 4,922,253 · App. 07/292,983
High attenuation broadband high speed RF shutter and method of making same
Inventors:
Harvey C. Nathanson, Michael C. Driver, Regis J. Betsch
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Jan 3, 1989
Inventors
Harvey C. Nathanson
Michael C. Driver
Regis J. Betsch
Assignee (at issue)
Westinghouse Electric Company LLC
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.