Granted Patent
Utility
US 4,889,385 · App. 07/165,745
Chair seat-and-back support
Inventors:
Donald Chadwick, Peter Glass
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Mar 9, 1988
Inventors
Donald Chadwick
Peter Glass
Assignee (at issue)
American Seating Company
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.