Granted Patent
Utility
US 6,521,361 · App. 09/828,767
Magnetic recording medium having specified acicular ratio relationship between non-magnetic and ferromagnetic particles
Inventors:
Kiyomi Ejiri, Masahiko Mori
Patented Case
View Patent ↗
Granted: Feb 18, 2003
Filed: Apr 9, 2001
Inventors
Kiyomi Ejiri
Masahiko Mori
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.