Granted Patent
Utility
US 4,719,776 · App. 06/894,745
Combination lock with combination-changing feature
Inventor:
Richard J. Molnar
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: Aug 11, 1986
Inventor
Richard J. Molnar
Assignee (at issue)
Presto Lock, 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.