Granted Patent
Utility
US 4,527,323 · App. 06/540,806
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Inventor:
John Dawson
Patented Case
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Granted: Jul 9, 1985
Filed: Oct 11, 1983
Inventor
John Dawson
Assignee (at issue)
COLE-PARMER INSTRUMENT COMPANY LLC
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.