Granted Patent
Utility
US 6,466,385 · App. 09/673,900
Method and apparatus of forming a magnetic disk with a servo sector and a data sector on a spiral track
Inventors:
Yoshio Umeda, Ryosuke Shimizu, Syuichi Yoshida, Tatsuaki Ishida, Kiyokazu Tohma, Keizo Miyata
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: Dec 7, 2000
Inventors
Yoshio Umeda
Ryosuke Shimizu
Syuichi Yoshida
Tatsuaki Ishida
Kiyokazu Tohma
Keizo Miyata
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.