Granted Patent
Utility
US 6,534,168 · App. 09/938,400
Magnetic recording medium comprising a lower layer containing specific flat acicular &agr;-iron oxide powder
Inventors:
Koji Naoe, Kiyomi Ejiri
Patented Case
View Patent ↗
Granted: Mar 18, 2003
Filed: Aug 23, 2001
Inventors
Koji Naoe
Kiyomi Ejiri
Assignee (at issue)
Fujitsu Limited
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.