Granted Patent
Utility
US 6,257,664 · App. 09/438,755
Multiple adjustable back assembly for use with wheelchair
Inventors:
Norman Chew, Nenad B. Medjedovic
Patented Case
View Patent ↗
Granted: Jul 10, 2001
Filed: Nov 11, 1999
Inventors
Norman Chew
Nenad B. Medjedovic
Assignee (at issue)
INVACARE 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.