Granted Patent
Utility
US 5,352,501 · App. 07/631,904
Longitudinal magnetic recording medium comprising a circumterentially textured disk substrate, chromium primer layer and a cobalt chromium magnetic alloy layer having a segregation structure
Inventors:
Yukihiro Miyamoto, Fumiaki Yokoyama
Patented Case
View Patent ↗
Granted: Oct 4, 1994
Filed: Dec 21, 1990
Inventors
Yukihiro Miyamoto
Fumiaki Yokoyama
Assignee (at issue)
Mitsubishi Kasei Corporation
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.