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USPTO Patent Rankings Data through Dec 31, 2025
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Shigeru Azuhata — 41 Patents

Hitachi: 41 patents #472 of 28,497Top 2%
BABabcock-Hitachi: 5 patents #43 of 415Top 15%
Honda Motor Co.: 1 patents #12,035 of 21,052Top 60%
Hitachi, JP: #60 of 2,929 inventorsTop 3%
Overall (All Time): #75,001 of 4,157,543Top 2%
41 Patents All Time
Shigeru Azuhata has been granted 41 US patents while listed as an inventor at Hitachi. The first was granted in 1980 and the most recent in March 2008. Shigeru Azuhata ranks #75,001 of 4,157,543 US inventors in our database (top 1.8%). Patent records list Shigeru Azuhata in Hitachi, JP.

Patents per Year

Patents granted per year, 1980 to 2008Bar chart with a peak of 5 patents in 2000.peak 51980: 1 patents19801985: 1 patents1987: 1 patents1988: 2 patents19881989: 1 patents1990: 2 patents1991: 3 patents19911993: 4 patents1994: 4 patents1996: 2 patents19961997: 2 patents1998: 1 patents1999: 3 patents19992000: 5 patents2001: 1 patents2002: 1 patents20022003: 1 patents2005: 2 patents2006: 1 patents20062007: 2 patents2008: 1 patents2008

Issued Patents All Time

Showing 1–25 of 41 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
7347980 Process for treating fluorine compound-containing gas Shuichi Kanno, Toshiaki Arato, Shinzo Ikeda, Ken Yasuda, Hisao Yamashita +2 more 2008-03-25 $208,000
7294315 Method and apparatus for disposing of fluorine-containing compound by decomposition Shuichi Kanno, Akio Honji, Hisao Yamashita, Shin Tamata, Kazuyoshi Irie 2007-11-13 $177,000
7261868 Process and apparatus for the decomposition of fluorine compounds Shuichi Kanno, Akio Honji, Hisao Yamashita, Shin Tamata, Kazuyoshi Irie 2007-08-28 $225,000
7093432 Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas of internal combustion engine Hiroshi Hanaoka, Osamu Kuroda, Ryouta Doi, Hidehiro Iizuka, Toshio Ogawa +6 more 2006-08-22
6942841 Process for treating fluorine compound-containing gas Shuichi Kanno, Toshiaki Arato, Shinzo Ikeda, Ken Yasuda, Hisao Yamashita +2 more 2005-09-13 $97,000
6855305 Process for treating fluorine compound-containing gas Shuichi Kanno, Toshiaki Arato, Shinzo Ikeda, Ken Yasuda, Hisao Yamashita +2 more 2005-02-15 $115,000
6596247 Method for purifying exhaust gas from internal combustion engines Hidehiro Iizuka, Ryouta Doi, Hiroshi Hanaoka, Toshio Ogawa, Osamu Kuroda +3 more 2003-07-22 $178,000
6397582 Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas of internal combustion engine Hiroshi Hanaoka, Osamu Kuroda, Ryouta Doi, Hidehiro Iizuka, Toshio Ogawa +6 more 2002-06-04 $159,000
6272848 Exhaust gas cleaning apparatus and method for internal combustion engine Kojiro Okude, Hidehiro Iizuka, Osamu Kuroda, Ryouta Doi, Toshio Ogawa +4 more 2001-08-14 $251,000
6161378 Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas internal combustion engine Hiroshi Hanaoka, Osamu Kuroda, Ryouta Doi, Hidehiro Iizuka, Toshio Ogawa +6 more 2000-12-19 $730,000
6077482 Method for treating organohalogen compounds with catalyst Shuichi Kanno, Hiroshi Kawagoshi, Akira Kato, Toshiaki Arato, Hisao Yamashita +1 more 2000-06-20 $551,000
6045764 Exhaust gas purifying method and catalyst used therefor Hidehiro Iizuka, Osamu Kuroda, Toshio Ogawa, Hisao Yamashita, Yuichi Kitahara +7 more 2000-04-04 $492,000
6026644 Stabilizer for gas turbine combustors and gas turbine combustor equipped with the stabilizer Kazuyuki Ito, Tadayoshi Murakami, Kazuhiko Kawaike, Michio Kuroda 2000-02-22 $620,000
6024929 Fluorescent lamp with a thin film photocatalyst, and method of creating the same Shinichi Ichikawa, Yoshinori Furukawa 2000-02-15 $1,211,000
5968870 Catalyst for purifying exhaust gas from internal combustion engine and purifying method thereof Hidehiro Iizuka, Ryouta Doi, Hiroshi Hanaoka, Toshio Ogawa, Osamu Kuroda +3 more 1999-10-19 $385,000
5899074 Gas turbine combustor and operation method thereof for a diffussion burner and surrounding premixing burners separated by a partition Yasutaka Komatsu, Haruo Urushidani, Nobuyuki Iizuka, Yasuyuki Watanabe, Hiroyuki Arai +3 more 1999-05-04 $788,000
5877391 Method for treating gas containing organohalogen compounds, and catalyst for decomposing the organohalogen compounds Shuichi Kanno, Hiroshi Kawagoshi, Akira Kato, Toshiaki Arato, Hisao Yamashita +3 more 1999-03-02 $267,000
5759504 Method for treating organohalogen compounds with catalyst Shuichi Kanno, Hiroshi Kawagoshi, Akira Kato, Toshiaki Arato, Hisao Yamashita +1 more 1998-06-02 $125,000
5660045 Gas turbine combustor and gas turbine Kazuyuki Ito, Tadayoshi Murakami, Nariyoshi Kobayashi, Yoshikazu Moritomo 1997-08-26 $145,000
5630320 Gas turbine combustor and gas turbine Noriaki Matsuda, Kunihiro Ichikawa, Nobuyuki Iizuka, Yoshikazu Moritomo, Yoshiharu Nakayama +1 more 1997-05-20 $107,000
5575153 Stabilizer for gas turbine combustors and gas turbine combustor equipped with the stabilizer Kazuyuki Ito, Tadayoshi Murakami, Kazuhiko Kawaike, Michio Kuroda 1996-11-19 $124,000
5533329 Control apparatus for and control method of gas turbine Yoshishige Ohyama, Yutaka Nishimura, Yoshio Sato, Motohisa Nishihara, Kazuyuki Ito 1996-07-09 $147,000
5349812 Gas turbine combustor and gas turbine generating apparatus Masayuki Taniguchi, Hironobu Kobayashi, Kiyoshi Narato, Tadayoshi Murakami, Michio Kuroda +1 more 1994-09-27 $74,000
5339635 Gas turbine combustor of the completely premixed combustion type Yasuo Iwai, Kenichi Sohma, Kiyoshi Narato, Hironobu Kobayashi, Tooru Inada +4 more 1994-08-23 $158,000
5328355 Combustor and combustion apparatus Hironobu Kobayashi, Masayuki Taniguchi, Tadayoshi Murakami, Kiyoshi Narato, Michio Kuroda +1 more 1994-07-12 $111,000