Granted Patent
Utility
US 4,763,643 · App. 06/910,485
Arc changing apparatus for a therapeutic oscillating bed
Inventor:
John H. Vrzalik
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Sep 23, 1986
Inventor
John H. Vrzalik
Assignee (at issue)
Kinetic Concepts, 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.