Granted Patent
Utility
US 6,347,016 · App. 09/101,590
Master information carrier, process for producing the carrier, and method and apparatus for recording master information signal on magnetic recording medium by using the carrier
Inventors:
Tatsuaki Ishida, Ryuji Sugita, Kiyokazu Tohma, Keizou Miyata, Hiroshi Ryonai
Patented Case
View Patent ↗
Granted: Feb 12, 2002
Filed: Jul 13, 1998
Inventors
Tatsuaki Ishida
Ryuji Sugita
Kiyokazu Tohma
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.