Granted Patent
Utility
US 4,851,801 · App. 07/269,053
Microwave C-switches and S-switches
Inventor:
Klaus Engel
Patented Case
View Patent ↗
Granted: Jul 25, 1989
Filed: Nov 9, 1988
Inventor
Klaus Engel
Assignee (at issue)
COM DEV LTD.
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.