Granted Patent
Utility
US 4,724,402 · App. 07/041,892
Phase-locked loop apparatus using an embedded oscillator as a lock detection means
Inventor:
Karl A. Ireland
Patented Case
View Patent ↗
Granted: Feb 9, 1988
Filed: Apr 23, 1987
Inventor
Karl A. Ireland
Assignee (at issue)
Rockwell International 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.