HR

Hiroshi Ryonai

Sumitomo Electric Industries: 11 patents #2,408 of 21,551Top 15%
PA Panasonic: 1 patents #13,264 of 21,108Top 65%
Overall (All Time): #420,065 of 4,157,543Top 15%
12
Patents All Time

Issued Patents All Time

Showing 1–12 of 12 patents

Patent #TitleCo-InventorsDate
8946579 Touch panel Seiichi Minami 2015-02-03
6961196 Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier Tatsuaki Ishida, Ryuji Sugita, Kiyokazu Tohma, Kazunari Yoshimoto, Keizou Miyata 2005-11-01
6858328 Master information support Tatsuaki Ishida, Kiyokazu Tohma, Keizo Miyata, Yoriko Takai, Taizou Hamada 2005-02-22
6714367 Master information medium and method of master information recording Tatsuaki Ishida, Nobuyuki Komura, Keizo Miyata, Kiyokazu Tohma 2004-03-30
6611388 Master information magnetic recorder Keizo Miyata, Tatsuaki Ishida, Taizou Hamada, Kiyokazu Tohma 2003-08-26
6606209 Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier Tatsuaki Ishida, Ryuji Sugita, Kiyokazu Tohma, Keizou Miyata 2003-08-12
6567227 Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier Tatsuaki Ishida, Ryuji Sugita, Kiyokazu Tohma, Kazunari Yoshimoto, Keizou Miyata 2003-05-20
6529341 Magnetic recording/reproduction device using preformat information Tatsuaki Ishida, Taizou Hamada, Kiyokazu Tohma, Keizou Miyata 2003-03-04
6347016 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 Tatsuaki Ishida, Ryuji Sugita, Kiyokazu Tohma, Keizou Miyata 2002-02-12
6242085 Magnetic recording medium and method for producing the same Tatsuaki Ishida, Kiyokazu Tohma, Keizou Miyata, Taizou Hamada 2001-06-05
5636092 Magnetic head having chromium nitride protective film for use in magnetic recording and/or reproducing apparatus and method of manufacturing the same Shogo Nasu 1997-06-03
5475552 Magnetic head having a chromium nitride protective film for use in a magnetic recording and/or reproducing apparatus and a method of manufacturing the same Shogo Nasu 1995-12-12