Granted Patent
Utility
US 5,429,399 · App. 07/964,131
Electronic delayed egress locking system
Inventors:
Arthur Geringer, Richard Geringer, David Geringer
Patented Case
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Granted: Jul 4, 1995
Filed: Oct 22, 1992
Inventors
Arthur Geringer
Richard Geringer
David Geringer
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.