Granted Patent
Utility
US 5,382,077 · App. 07/921,895
Height adjustment mechanism for a chair seat back
Inventors:
William S. Stumpf, Art A. Patton, Gerard Helmond
Patented Case
View Patent ↗
Granted: Jan 17, 1995
Filed: Jul 29, 1992
Inventors
William S. Stumpf
Art A. Patton
Gerard Helmond
Assignee (at issue)
Doerner Products Ltd.
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.