Granted Patent
Utility
US 4,370,754 · App. 06/080,095
Variable pressure pad
Inventor:
Byron A. Donzis
Patented Case
View Patent ↗
Granted: Feb 1, 1983
Filed: Sep 28, 1979
Inventor
Byron A. Donzis
Assignee (at issue)
American Pneumatics Co.
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.