Keikichi Ando has been granted 10 US patents while listed as an inventor at Hitachi . The first was granted in 1981 and the most recent in October 2005. Keikichi Ando ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list Keikichi Ando in Musashino, JP.
Patents per Year Patents granted per year, 1981 to 2005 Bar chart with a peak of 1 patents in 1981. peak 1 1981: 1 patents 1981 1982: 1 patents 1982 1983: 1 patents 1983 1985: 1 patents 1985 1986: 1 patents 1986 1995: 1 patents 1995 2002: 1 patents 2002 2003: 1 patents 2003 2004: 1 patents 2004 2005: 1 patents 2005
Issued Patents All Time
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Showing 1–10 of 10 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
6954941 Information recording medium and information recording device Makoto Miyamoto , Junko Ushiyama , Yumiko Anzai , Akemi Hirotsune , Motoyasu Terao +3 more 2005-10-11
$104,000
6806030 Information recording medium and method for manufacturing information recording medium Motoyasu Terao , Makoto Miyamoto , Yasushi Miyauchi , Yumiko Anzai , Junko Ushiyama +3 more 2004-10-19
$265,000
6636477 Information recording medium and information recording device Makoto Miyamoto , Junko Ushiyama , Yumiko Anzai , Akemi Hirotsune , Motoyasu Terao +3 more 2003-10-21
$170,000
6383595 Information recording medium Akemi Hirotsune , Motoyasu Terao , Makoto Miyamoto , Yasushi Miyauchi , Tetsuya Nishida +5 more 2002-05-07
$127,000
5404348 Method for recording and reproducing information using at least two energy beams Motoyasu Terao , Kunikazu Ohnishi , Tesuya Nishida , Hiroshi Yasuoka , Norio Ohta +3 more 1995-04-04
$39,000
4581579 Optical magnetic-field measuring apparatus having improved temperature characteristics Kazuyuki Nagatsuma , Hiroyoshi Matsumura , Tsuneo Suganuma , Norio Ohta , Yuzuru Hosoe +1 more 1986-04-08
$41,000
4532180 Garnet film for ion-implanted magnetic bubble device Norio Ohta , Yuzuru Hosoe , Yutaka Sugita , Fumihiko Ishida 1985-07-30
$29,000
4397912 Garnet film for magnetic bubble element Norio Ohta , Yuzuru Hosoe , Yutaka Sugita 1983-08-09
$127,000
4338372 Garnet film for magnetic bubble device Norio Ohta , Fumihiko Ishida , Tadashi Ikeda , Yutaka Sugita 1982-07-06
$59,000
4267230 Film for a magnetic bubble domain device Norio Ohta , Fumihiko Ishida , Tadashi Ikeda , Yutaka Sugita 1981-05-12
$136,000
