Granted Patent
Utility
US 5,161,909 · App. 07/605,147
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Inventors:
Stephanie P. Crouse, Harold L. Bernard
Patented Case
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Granted: Nov 10, 1992
Filed: Oct 29, 1990
Inventors
Stephanie P. Crouse
Harold L. Bernard
Assignee (at issue)
R. D. Werner Co., 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.