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USPTO Patent Rankings Data through Dec 31, 2025
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Hiroaki Nambu — 36 Patents

Hitachi: 23 patents #1,433 of 28,497Top 6%
HCHitachi Device Engineering Co.: 14 patents #11 of 514Top 3%
RTRenesas Technology: 13 patents #156 of 3,337Top 5%
HCHitachi Ulsi Systems Co.: 7 patents #101 of 867Top 15%
HCHitachi Engineering Co.: 4 patents #38 of 572Top 7%
Hachioji, JP: #142 of 2,869 inventorsTop 5%
Overall (All Time): #92,222 of 4,157,543Top 3%
36 Patents All Time
Hiroaki Nambu has been granted 36 US patents while listed as an inventor at Hitachi. The first was granted in 1987 and the most recent in March 2010. Hiroaki Nambu ranks #92,222 of 4,157,543 US inventors in our database (top 2.2%). Patent records list Hiroaki Nambu in Hachioji, JP.

Issued Patents All Time

Showing 1–25 of 36 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
7685455 Semiconductor integrated circuit which generates internal clock signal for fetching input data synchronously with the internal clock signal without decrease of timing margin Masao Shinozaki, Kazuo Kanetani, Hideto Kazama 2010-03-23 $80,000
7426152 Semiconductor memory device and semiconductor device Masahiro Yamashita, Takashi Uehara, Mamoru Takaku 2008-09-16 $290,000
7296173 Semiconductor integrated circuit Masao Shinozaki, Kazuo Kanetani, Hideto Kazama 2007-11-13 $177,000
7269086 Semiconductor memory device and semiconductor device Masahiro Yamashita, Takashi Uehara, Mamoru Takaku 2007-09-11 $144,000
7233045 Semiconductor device and system Takemi Negishi, Kazuo Kanetani, Hideto Kazama 2007-06-19 $320,000
7164592 Semiconductor device Yasuhiro Yoshikawa, Motoo Suwa 2007-01-16 $149,000
7123534 Semiconductor memory device having short refresh time Noriyuki Homma 2006-10-17 $111,000
6998878 Semiconductor integrated circuit and semiconductor logic circuit used in the integrated circuit Kazuo Kanetani, Kaname Yamasaki, Takeshi Kusunoki, Keiichi Higeta, Kunihiko Yamaguchi +1 more 2006-02-14 $132,000
6954401 Semiconductor memory device integrating source-coupled-logic (SCL) circuit into an address buffer and a decoder Kazuo Kanetani 2005-10-11 $104,000
6876573 Semiconductor memory device Keiichi Higeta, Shigeru Nakahara 2005-04-05 $81,000
6842394 Semiconductor device using SCL circuit Kazuo Kanetani 2005-01-11 $142,000
6807115 Method of testing a semiconductor integrated device Kazuo Kanetani, Kaname Yamasaki, Fumihiko Arakawa, Takeshi Kusunoki, Keiichi Higeta 2004-10-19 $265,000
6806516 Semiconductor device and system Takemi Negishi, Kazuo Kanetani, Hideto Kazama 2004-10-19
6791895 Semiconductor memory device Keiichi Higeta, Shigeru Nakahara 2004-09-14
6677782 Semiconductor integrated circuit and semiconductor logic circuit used in the integrated circuit Kazuo Kanetani, Kaname Yamasaki, Takeshi Kusunoki, Keiichi Higeta, Kunihiko Yamaguchi +1 more 2004-01-13 $223,000
6657887 Semiconductor memory device having improved noise margin, faster read rate and reduced power consumption Keiichi Higeta, Shigeru Nakahara 2003-12-02
6617610 Semiconductor integrated circuit Kazuo Kanetani, Kaname Yamasaki, Fumihiko Arakawa, Takeshi Kusunoki, Keiichi Higeta 2003-09-09 $256,000
6476644 Clocked logic gate circuit Kazuo Kanetani, Kaname Yamasaki, Noboru Masuda, Kenji Kaneko, Makoto Hanawa +1 more 2002-11-05 $73,000
6438050 Signal transmission circuit and semiconductor memory using the same Kazuo Kanetani, Kaname Yamasaki, Takeshi Kusunoki, Fumihiko Arakawa 2002-08-20 $103,000
6369617 Semiconductor integrated circuit and semiconductor logic circuit used in the integrated circuit Kazuo Kanetani, Kaname Yamasaki, Takeshi Kusunoki, Keiichi Higeta, Kunihiko Yamaguchi +1 more 2002-04-09 $263,000
6356493 Signal transmission circuit and semiconductor memory using the same Kazuo Kanetani, Kaname Yamasaki, Takeshi Kusunoki, Fumihiko Arakawa 2002-03-12 $316,000
6337581 Signal transmission circuit and semiconductor memory using the same Kazuo Kanetani, Kaname Yamasaki, Takeshi Kusunoki, Fumihiko Arakawa 2002-01-08 $223,000
6333645 Clocked logic gate circuit Kazuo Kanetani, Kaname Yamasaki, Noboru Masuda, Kenji Kaneko, Makoto Hanawa +1 more 2001-12-25
6333881 Semiconductor memory Takeshi Kusunoki, Fumihiko Arakawa, Kazuo Kanetani, Kaname Yamasaki 2001-12-25
6316961 Clocked logic gate circuit Kazuo Kanetani, Kaname Yamasaki, Noboru Masuda, Kenji Kaneko, Makoto Hanawa +1 more 2001-11-13 $240,000