Granted Patent
Utility
US 4,308,472 · App. 06/099,948
Clock check circuit
Inventor:
Donald W. McLaughlin
Patented Case
View Patent ↗
Granted: Dec 29, 1981
Filed: Dec 3, 1979
Inventor
Donald W. McLaughlin
Assignee (at issue)
GTE Automatic Electric Labs 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.