Granted Patent
Utility
US 5,492,476 · App. 08/255,486
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Inventors:
Douglas C. Ball, Lon D. Scheerhorn
Patented Case
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Granted: Feb 20, 1996
Filed: Jun 8, 1994
Inventors
Douglas C. Ball
Lon D. Scheerhorn
Assignee (at issue)
Steelcase 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.