Granted Patent
Utility
US 4,644,484 · App. 06/612,687
Stand-alone access control system clock control
Inventors:
Kevin Flynn, Eric Schultz
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: May 22, 1984
Inventors
Kevin Flynn
Eric Schultz
Assignee (at issue)
American District Telegraph Company
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.