Granted Patent
Utility
US 4,580,423 · App. 06/548,361
Garage door lock mechanism
Inventor:
Clark E. Craig
Patented Case
View Patent ↗
Granted: Apr 8, 1986
Filed: Nov 3, 1983
Inventor
Clark E. Craig
Assignee (at issue)
Keystone Consolidated Industries, 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.