Granted Patent
Utility
US 4,646,547 · App. 06/608,819
Dead bolt combination lock
Inventors:
Stephen S. Scelba, Richard J. Molnar
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: May 10, 1984
Inventors
Stephen S. Scelba
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.