Granted Patent
Utility
US 5,143,391 · App. 07/612,859
Modular wheelchair
Inventors:
A. Scott Robertson, Richard Geiger, Robert W. Lishman
Patented Case
View Patent ↗
Granted: Sep 1, 1992
Filed: Nov 14, 1990
Inventors
A. Scott Robertson
Richard Geiger
Robert W. Lishman
Assignee (at issue)
Medical Composite Technology, 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.