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USPTO Patent Rankings Data through Dec 31, 2025
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Kei Hirota — 16 Patents

Panasonic: 11 patents #2,338 of 21,108Top 15%
TATayca: 5 patents #4 of 63Top 7%
Okayama, JP: #60 of 1,590 inventorsTop 4%
Overall (All Time): #284,196 of 4,157,543Top 7%
16 Patents All Time
Kei Hirota has been granted 16 US patents while listed as an inventor at Panasonic. The first was granted in 2011 and the most recent in September 2025. Kei Hirota ranks #284,196 of 4,157,543 US inventors in our database (top 6.8%). Patent records list Kei Hirota in Okayama, JP.

Patents per Year

Patents granted per year, 2011 to 2025Bar chart with a peak of 7 patents in 2025.peak 72011: 1 patents20112016: 2 patents20162017: 1 patents20172018: 1 patents20182024: 4 patents20242025: 7 patents2025

Issued Patents All Time

Showing 1–16 of 16 patents

Patent #TitleCo-InventorsDate
12406814 Solid electrolytic capacitor element, solid electrolytic capacitor and method for producing same TOMOKI SUGIMOTO 2025-09-02
12400802 Electrolytic capacitor Keita Uenaka, Yukihiro Shimasaki, Hiroki Imamura 2025-08-26
12368005 Solid electrolytic capacitor element and solid electrolytic capacitor Takahiro Yoshii, Hiromi Ozawa 2025-07-22
12354812 Solid electrolytic capacitor element and solid electrolytic capacitor Takahiro Yoshii 2025-07-08
12283435 Solid electrolytic capacitor and method for manufacturing same Kyohei Iwaoka, Hitoshi Fukui, Daisuke Usa, Kouta Muneyasu, Hiroki Nagayama 2025-04-22
12205773 Electrolytic capacitor and capacitor element Keita Uenaka, Hideki Shimamoto, Nao Matsumura 2025-01-21
12198868 Solid electrolytic capacitor element and solid electrolytic capacitor Keita Uenaka, Yuta Tomimatsu 2025-01-14
12154726 Solid electrolytic capacitor element and solid electrolytic capacitor Yuma Imanishi 2024-11-26
12087514 Electrolytic capacitor and paste for forming conductive layer of electrolytic capacitor Keita Uenaka 2024-09-10
11915884 Electrolytic capacitor Keita Uenaka, Yukihiro Shimasaki, Hiroki Imamura 2024-02-27
11862406 Solid electrolytic capacitor and method for manufacturing same Kyohei Iwaoka, Hitoshi Fukui, Daisuke Usa, Kouta Muneyasu, Hiroki Nagayama 2024-01-02
9953767 Conductive polymer dispersion liquid, a conductive polymer, and use thereof Ryosuke Sugihara, Kazuto Fujihara 2018-04-24
9589738 Solid electrolyte capacitor and a method for manufacturing the same Ryosuke Sugihara 2017-03-07
9460860 Dispersion of electrically conductive polymer, and electrically conductive polymer and use thereof Ryosuke Sugihara, Kazuto Fujihara 2016-10-04
9362055 Method for manufacturing solid electrolytic capacitor Ryosuke Sugihara 2016-06-07
7990684 Dispersion liquid of a conductive composition, a conductive composition, and a solid electrolytic capacitor Ryousuke Sugihara 2011-08-02

Frequent Collaborators

Keita Uenaka5 shared
Ryosuke Sugihara4 shared
Kazuto Fujihara2 shared
Kouta Muneyasu2 shared
Yukihiro Shimasaki2 shared
Hiroki Nagayama2 shared

Nearby-Ranked Inventors

Chung-Lin Fu16
Tyrone T. Chen16
Shivendra Katiyar16
Kevin E. Kalajan16
Henry Y. Mark16
Marco Becker16
Nak Gi Sung16
Kenta Iwai16
Brock Mammoser16