Granted Patent
Utility
US 6,744,583 · App. 10/212,688
Method for forming a magnetic pattern in a magnetic recording medium, a magnetic pattern forming device, a magnetic recording medium and a magnetic recording device
Inventors:
Hiroyuki Ikeda, Yuzo Seo, Youji Arita
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Aug 7, 2002
Inventors
Hiroyuki Ikeda
Yuzo Seo
Youji Arita
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.