Granted Patent
Utility
US 4,007,493 · App. 05/574,872
Track positioning system for magnetic transducer head
Inventors:
Michael I. Behr, Norman S. Blessum, Wilfred D. Iwan
Patented Case
View Patent ↗
Granted: Feb 8, 1977
Filed: May 6, 1975
Inventors
Michael I. Behr
Norman S. Blessum
Wilfred D. Iwan
Assignee (at issue)
Burroughs, 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.