Granted Patent
Utility
US 4,344,328 · App. 06/094,137
Frequency detector
Inventor:
Royal R. Hawkins
Patented Case
View Patent ↗
Granted: Aug 17, 1982
Filed: Nov 14, 1979
Inventor
Royal R. Hawkins
Assignee (at issue)
Sundstrand 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.