Granted Patent
Utility
US 4,494,795 · App. 06/375,550
Variable back adjuster for chairs
Inventors:
Charles P. Roossien, Brian B. Chambers, Bruce A. Hiemstra
Patented Case
View Patent ↗
Granted: Jan 22, 1985
Filed: May 6, 1982
Inventors
Charles P. Roossien
Brian B. Chambers
Bruce A. Hiemstra
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.