Granted Patent
Utility
US 4,806,891 · App. 07/166,860
Broadband signal frequency multiplier apparatus using dielectric resonator means
Inventor:
Pramode Kandpal
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Mar 11, 1988
Inventor
Pramode Kandpal
Assignee (at issue)
Rockwell International Corporation
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.