Granted Patent
Utility
US 6,567,227 · App. 10/108,029
Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier
Inventors:
Tatsuaki Ishida, Ryuji Sugita, Kiyokazu Tohma, Kazunari Yoshimoto, Keizou Miyata, Hiroshi Ryonai
Patented Case
View Patent ↗
Granted: May 20, 2003
Filed: Mar 26, 2002
Inventors
Tatsuaki Ishida
Ryuji Sugita
Kiyokazu Tohma
Kazunari Yoshimoto
Keizou Miyata
Hiroshi Ryonai
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.