Granted Patent
Utility
US 5,163,439 · App. 07/685,454
Rhythmic biofeedback technique
Inventor:
Irving I. Dardik
Patented Case
View Patent ↗
Granted: Nov 17, 1992
Filed: Apr 12, 1991
Inventor
Irving I. Dardik
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.