Granted Patent
Utility
US 4,356,558 · App. 06/105,489
Optimum second order digital filter
Inventors:
William J. Owen, Robert A. Booker
Patented Case
View Patent ↗
Granted: Oct 26, 1982
Filed: Dec 20, 1979
Inventors
William J. Owen
Robert A. Booker
Assignee (at issue)
LOCKHEED MARTIN 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.