Granted Patent
Utility
US 4,231,597 · App. 05/903,164
Flush-type door lock
Inventor:
Albert L. Pelcin
Patented Case
View Patent ↗
Granted: Nov 4, 1980
Filed: May 5, 1978
Inventor
Albert L. Pelcin
Assignee (at issue)
The Eastern 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.