Granted Patent
Utility
US 4,978,931 · App. 07/363,247
Tunable phase shifter having wide instantaneous bandwidth
Inventors:
Stuart L. Carp, Allen P. Edwards
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Jun 8, 1989
Inventors
Stuart L. Carp
Allen P. Edwards
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.