Granted Patent
Utility
US 6,644,751 · App. 10/079,735
Shock absorbing seat
Inventors:
Clifton J. Ratza, Jeffrey S. Wilcox, Trent A. Eekhoff
Patented Case
View Patent ↗
Granted: Nov 11, 2003
Filed: Feb 21, 2002
Inventors
Clifton J. Ratza
Jeffrey S. Wilcox
Trent A. Eekhoff
Assignee (at issue)
Steelcase Development Corporation
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.