Granted Patent
Utility
US 6,781,779 · App. 09/854,679
Magnetic recording medium, its production method and magnetic recording apparatus
Inventors:
Yoji Arita, Hiroyuki Ikeda
Patented Case
View Patent ↗
Granted: Aug 24, 2004
Filed: May 15, 2001
Inventors
Yoji Arita
Hiroyuki Ikeda
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, LTD.
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.