Granted Patent
Utility
US 4,717,488 · App. 06/856,073
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Inventors:
James M. Seheult, Ernest Len Grebe
Patented Case
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Granted: Jan 5, 1988
Filed: Apr 23, 1986
Inventors
James M. Seheult
Ernest Len Grebe
Assignee (at issue)
MERCK & 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.