Granted Patent
Utility
US 5,242,761 · App. 07/547,669
Magnetic recording medium comprising NiFe and CoZr alloy crystalline magnetic alloy layers and a Co-Cr vertically magnetizable layer
Inventor:
Yoichi Uchiyama
Patented Case
View Patent ↗
Granted: Sep 7, 1993
Filed: Jul 3, 1990
Inventor
Yoichi Uchiyama
Assignee (at issue)
Digital Equipment Corporation Japan
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.