Granted Patent
Utility
US 4,293,921 · App. 06/048,810
Method and signal processor for frequency analysis of time domain signals
Inventor:
Winthrop W. Smith
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Jun 15, 1979
Inventor
Winthrop W. Smith
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.