Granted Patent
Utility
US 4,345,367 · App. 06/247,805
Method of manufacturing an extended life multichannel magnetic transducer
Inventor:
James Chase
Patented Case
View Patent ↗
Granted: Aug 24, 1982
Filed: Mar 26, 1981
Inventor
James Chase
Assignee (at issue)
Ampex Corporation
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.