Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Takeshi Obana — 3 Patents

Hitachi: 3 patents #10,718 of 28,497Top 40%
Hitachi, JP: #1,311 of 2,929 inventorsTop 45%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
Takeshi Obana has been granted 3 US patents while listed as an inventor at Hitachi. The first was granted in 2000 and the most recent in April 2003. Takeshi Obana ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Takeshi Obana in Hitachi, JP.

Patents per Year

Patents granted per year, 2000 to 2003Bar chart with a peak of 1 patents in 2000.peak 12000: 1 patents20002001: 1 patents20012003: 1 patents2003

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6555779 Underwater processing device and underwater processing method Kunio Miyazaki, Hisanori Okamura, Takeshi Tsukamoto, Takahiko Kato, Masato Koshiishi 2003-04-29 $80,000
6328530 MG alloy member and its use Tomoya Kato, Mitsuyoshi Shouji, Kazumi Fujii, Kenya Ohashi 2001-12-11 $132,000
6146094 Motor-driven blower and method of manufacturing impeller for motor-driven blower Kiyomi Nakamura, Masahisa Inagaki, Yasuhisa Aono, Hisanori Okamura, Hisao Suka +1 more 2000-11-14 $786,000