Granted Patent
Utility
US 4,589,574 · App. 06/556,420
Dispensing pump having collar-to-body anti-rotation interlock
Inventor:
Donald D. Foster
Patented Case
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Granted: May 20, 1986
Filed: Nov 30, 1983
Inventor
Donald D. Foster
Assignee (at issue)
Realex 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.