Granted Patent
Utility
US 4,954,921 · App. 07/241,090
Magnetic transducer head structure with reduced leakage between core circuits
Inventor:
Michael L. Bolt
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Sep 6, 1988
Inventor
Michael L. Bolt
Assignee (at issue)
Irwin Magnetic Systems, 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.