Granted Patent
Utility
US 4,979,768 · App. 07/399,671
Deadbolt backset latch with interlock
Inventors:
Robert A. Marotto, Mohamed L. Benchaar
Patented Case
View Patent ↗
Granted: Dec 25, 1990
Filed: Aug 28, 1989
Inventors
Robert A. Marotto
Mohamed L. Benchaar
Assignee (at issue)
Dexter Lock 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.