Granted Patent
Utility
US 4,849,841 · App. 07/036,915
Transducer head core structure with recessed magnetic closures
Inventor:
Edmund L. Sokolik
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Apr 10, 1987
Inventor
Edmund L. Sokolik
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.