Granted Patent
Utility
US 6,468,670 · App. 09/487,234
Magnetic recording disk with composite perpendicular recording layer
Inventors:
Yoshihiro Ikeda, Manfred Ernst Schabes, Yoshiaki Sonobe, Kentaro Takano, Dieter K. Weller
Patented Case
View Patent ↗
Granted: Oct 22, 2002
Filed: Jan 19, 2000
Inventors
Yoshihiro Ikeda
Manfred Ernst Schabes
Yoshiaki Sonobe
Kentaro Takano
Dieter K. Weller
Assignee (at issue)
International Business Machines 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.