Granted Patent
Utility
US 4,951,995 · App. 07/418,847
Arm height adjustment mechanism for a chair
Inventors:
David S. Teppo, Thomas R. Demmon, Larry DeKraker, James P. Steffens
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Oct 10, 1989
Inventors
David S. Teppo
Thomas R. Demmon
Larry DeKraker
James P. Steffens
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.