Granted Patent
Utility
US 4,707,653 · App. 06/788,352
Frequency measurement circuit
Inventor:
Steven D. Wagner
Patented Case
View Patent ↗
Granted: Nov 17, 1987
Filed: Oct 17, 1985
Inventor
Steven D. Wagner
Assignee (at issue)
Ampex 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.