Granted Patent
Utility
US 4,862,921 · App. 07/226,429
Air distribution system for air support convalescent beds
Inventor:
Jack H. Hess
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Jul 29, 1988
Inventor
Jack H. Hess
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.