Granted Patent
Utility
US 4,486,133 · App. 06/323,732
Retainer for mechanical fastener member
Inventor:
Donald L. Pletcher
Patented Case
View Patent ↗
Granted: Dec 4, 1984
Filed: Nov 23, 1981
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.