Granted Patent
Utility
US 4,375,301 · App. 06/145,624
Chair seat adjustment assembly
Inventors:
Charles C. Pergler, Jack R. Knoblauch
Patented Case
View Patent ↗
Granted: Mar 1, 1983
Filed: May 1, 1980
Inventors
Charles C. Pergler
Jack R. Knoblauch
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.