Granted Patent
Utility
US 5,138,729 · App. 07/641,697
Patient support system
Inventor:
Robert J. Ferrand
Patented Case
View Patent ↗
Granted: Aug 18, 1992
Filed: Jan 16, 1991
Inventor
Robert J. Ferrand
Assignee (at issue)
American Life Support Technology
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.