Granted Patent
Utility
US 6,268,821 · App. 05/844,260
Multiple band sidelobe canceller
Inventors:
William W. Shrader, Vilhelm Gregers Hansen
Patented Case
View Patent ↗
Granted: Jul 31, 2001
Filed: Oct 21, 1977
Inventors
William W. Shrader
Vilhelm Gregers Hansen
Assignee (at issue)
Raytheon Company
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.