Granted Patent
Utility
US 4,516,250 · App. 06/526,642
Frequency and phase comparator with slip detection capability
Inventor:
Gary J. Grimes
Patented Case
View Patent ↗
Granted: May 7, 1985
Filed: Aug 26, 1983
Inventor
Gary J. Grimes
Assignee (at issue)
AT&T Information Systems Inc.
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.