Granted Patent
Utility
US 4,815,839 · App. 07/081,013
Infrared/video electronystagmographic apparatus
Inventor:
Ronald Waldorf
Patented Case
View Patent ↗
Granted: Mar 28, 1989
Filed: Aug 3, 1987
Inventor
Ronald Waldorf
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.