Granted Patent
Utility
US 4,643,389 · App. 06/686,989
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Inventors:
Edward E. Elson, Farley W. Bolwell, Wayne E. Manska, Stanley G. Shoffner
Patented Case
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Granted: Feb 17, 1987
Filed: Dec 27, 1984
Inventors
Edward E. Elson
Farley W. Bolwell
Wayne E. Manska
Stanley G. Shoffner
Assignee (at issue)
American Hospital Supply Corp.
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.