Granted Patent
Utility
US 5,393,136 · App. 08/066,761
Drawer with convertible filing support system
Inventors:
Daniel Grabowski, John Van Kammen
Patented Case
View Patent ↗
Granted: Feb 28, 1995
Filed: May 25, 1993
Inventors
Daniel Grabowski
John Van Kammen
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.