Granted Patent
Utility
US 4,593,253 · App. 06/655,695
Flip-flop phase detector circuit for phase locked loop
Inventors:
David J. McCabe, Geoffrey W. Sumerling
Patented Case
View Patent ↗
Granted: Jun 3, 1986
Filed: Sep 28, 1984
Inventors
David J. McCabe
Geoffrey W. Sumerling
Assignee (at issue)
Plessey Overseas Limited
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.