Granted Patent
Utility
US 4,592,370 · App. 06/444,624
Ear canal electrode for auditory testing
Inventors:
John J. Lee, Arthur F. Avila, Hal C. Danby, Myron A. Beigler
Patented Case
View Patent ↗
Granted: Jun 3, 1986
Filed: Nov 26, 1982
Inventors
John J. Lee
Arthur F. Avila
Hal C. Danby
Myron A. Beigler
Assignee (at issue)
Minnesota Mining and Manufacturing Company
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.