Granted Patent
Utility
US 5,842,681 · App. 08/605,473
Pivotal hopper tee with alignable swing-away hopper tee assembly
Inventor:
David E. Sisk
Patented Case
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Granted: Dec 1, 1998
Filed: Feb 26, 1996
Inventor
David E. Sisk
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.