Granted Patent
Utility
US 5,487,591 · App. 08/252,666
Back shell with selective stiffening
Inventor:
Glenn A. Knoblock
Patented Case
View Patent ↗
Granted: Jan 30, 1996
Filed: May 31, 1994
Inventor
Glenn A. Knoblock
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.