Granted Patent
Utility
US 4,891,717 · App. 06/909,797
Methods and apparatus for performing high density isotropic/perpendicular digital magnetic recording
Inventor:
Vadim B. Minuhin
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Sep 22, 1986
Inventor
Vadim B. Minuhin
Assignee (at issue)
Magnetic Peripherals, 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.