Granted Patent
Utility
US 4,645,393 · App. 06/676,052
Retainer for mechanical fastener member
Inventor:
Donald L. Pletcher
Patented Case
View Patent ↗
Granted: Feb 24, 1987
Filed: Nov 29, 1984
Inventor
Donald L. Pletcher
Assignee (at issue)
Midland-Ross Corporation
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.