Toru Katakura has been granted 10 US patents while listed as an inventor at Sony . The first was granted in 1988 and the most recent in August 2006. Toru Katakura ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list Toru Katakura in Rifu, JP.
Patents per Year Patents granted per year, 1988 to 2006 Bar chart with a peak of 2 patents in 2001. peak 2 1988: 1 patents 1988 2001: 2 patents 2001 2002: 1 patents 2002 2004: 2 patents 2004 2005: 2 patents 2005 2006: 2 patents 2006
Issued Patents All Time
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Showing 1–10 of 10 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
7092224 Magnetic tunnel effect type magnetic head, and method of producing same Eiji Nakashio , Seiji Onoe , Junichi Sugawara 2006-08-15
$690,000
7092225 Magnetic tunnel effect type magnetic head, and method of producing same Eiji Nakashio , Seiji Onoe , Junichi Sugawara 2006-08-15
$690,000
6895657 Method for producing a slider for an optical head Akio Mishima 2005-05-24
$489,000
6873502 Magnetic tunnel effect type magnetic head, and method of producing same Eiji Nakashio , Seiji Onoe , Junichi Sugawara 2005-03-29
$543,000
6781950 Slider for an optical head with a terminal groove having an inclined bottom surface Akio Mishima 2004-08-24
$757,000
6678126 Magnetoresistance-effect magnetic head Takuji Matsuo , Eiji Nakashio , Junichi Sugawara , Seiji Onoe 2004-01-13
$847,000
6368519 Etching method and a method of manufacturing a magnetic head Teiichi Miyauchi , Yuko Takanashi 2002-04-09
$959,000
6292329 Thin film single magnetic head Jin Sato , Yoshihisa Nakamura , Hiroaki Muraoka 2001-09-18
$689,000
6187513 Process for forming mask pattern and process for producing thin film magnetic head — 2001-02-13
$1,324,000
4729048 Magnetic transducer combination with formatting, data, and servo heads Shigeyoshi Imakoshi , Hideo Suyama , Hiroaki Yada , Tetsuo Sekiya , Masayuki Nakayama 1988-03-01
$267,000
