Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
TS

Tomohiro Sakai — 68 Patents

SESeiko Epson: 38 patents #330 of 7,774Top 5%
Nec: 8 patents #1,746 of 14,502Top 15%
SCSumitomo Chemical: 7 patents #703 of 4,033Top 20%
ACAsahi Glass Co.: 4 patents #490 of 2,251Top 25%
AEAgc Glass Europe: 3 patents #57 of 252Top 25%
AGAgc: 3 patents #235 of 954Top 25%
Canon: 2 patents #12,732 of 19,416Top 70%
TEThine Electronics: 2 patents #21 of 58Top 40%
TCToyoda Gosei Co.: 1 patents #1,271 of 2,296Top 60%
Fujitsu Limited: 1 patents #14,843 of 24,456Top 65%
Toyota: 1 patents #15,486 of 26,838Top 60%
KOKomatsu: 1 patents #1,191 of 2,087Top 60%
AKAisan Kogyo Kabushiki Kaisha: 1 patents #344 of 642Top 55%
Nagano, JP: #41 of 3,331 inventorsTop 2%
Overall (All Time): #30,786 of 4,157,543Top 1%
68 Patents All Time
Tomohiro Sakai has been granted 68 US patents while listed as an inventor at Seiko Epson. The first was granted in 1997 and the most recent in May 2025. Tomohiro Sakai ranks #30,786 of 4,157,543 US inventors in our database (top 0.74%). Patent records list Tomohiro Sakai in Nagano, JP.

Patents per Year

Patents granted per year, 1997 to 2025Bar chart with a peak of 13 patents in 2014.peak 131997: 1 patents19972002: 2 patents2003: 1 patents20032006: 1 patents2007: 3 patents20072008: 2 patents2009: 1 patents20092010: 1 patents2014: 13 patents20142015: 5 patents2016: 6 patents20162017: 1 patents2018: 2 patents20182019: 6 patents2020: 4 patents20202021: 6 patents2022: 6 patents20222023: 2 patents2024: 2 patents20242025: 3 patents2025

Issued Patents All Time

Showing 1–25 of 68 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12304204 Piezoelectric body, piezoelectric element, and liquid ejection head Kazuya Kitada, Yasuto KAKEMURA 2025-05-20
12310242 Piezoelectric element and liquid ejection head Yasuaki Hamada, Toshihiro Shimizu, Masao Nakayama 2025-05-20
12206035 Solar battery module, method for manufacturing same, and construction-use exterior wall material using same Yu Onozaki, Yasuo Sugawara, Yuichi Kuwahara 2025-01-21
12167697 Piezoelectric element, piezoelectric element application device Yasuaki Hamada 2024-12-10
12138926 Piezoelectric substrate, piezoelectric element and liquid ejection head Yasuaki Hamada, Toshihiro Shimizu, Masao Nakayama 2024-11-12
11616155 Cover glass for solar cell module and solar cell module Tetsuji Irie, Yu Onozaki, Aichi Inoue, Manabu Nishizawa, Hiroyuki Yamamoto 2023-03-28
11563403 Coating material, cover glass, solar cell module and outer wall material for building Yu Onozaki, Shun Saito, Noriyoshi KAYABA, Aichi Inoue, Tetsuji Irie 2023-01-24
11527699 Piezoelectric element, liquid discharge head, and printer Yasuaki Hamada 2022-12-13
11496535 Video data transmission apparatus, video data transmitting method, and storage medium 2022-11-08 $27,000
11417828 Piezoelectric element, piezoelectric element application device, and method of manufacturing piezoelectric element Kazuya Kitada, Koji Sumi 2022-08-16
11374162 Piezoelectric element, method for manufacturing the same, and piezoelectric element-applied device Koji Sumi, Tomokazu Kobayashi, Kazuya Kitada, Koichi Morozumi, Tsutomu Asakawa 2022-06-28
11302918 Cathode active material, positive electrode for lithium ion secondary battery, and lithium ion secondary battery 2022-04-12 $16,909,000
11239463 Process for producing cathode active material, cathode active material, positive electrode, and lithium ion secondary battery 2022-02-01 $16,992,000
11165060 Cathode active material, its production process, and positive electrode for lithium ion secondary battery 2021-11-02
11122187 Transmitter, receiver, transmitter/receiver, and transmitting/receiving system Kazuhisa Sasaki, Satoshi Miura, Daisuke Iwama 2021-09-14
11038167 Cathode active material, positive electrode for lithium ion secondary battery, and lithium ion secondary battery Tsubasa Takasugi 2021-06-15
11014357 Piezoelectric element, liquid discharge head, and printer Kazuya Kitada, Yasumi Ikehara 2021-05-25
10951887 Imaging apparatus, processing method for imaging apparatus, and storage medium 2021-03-16 $37,000
10937942 Piezoelectric element and piezoelectric element-applied device Kazuya Kitada, Koji Sumi, Toshiaki Takahashi, Tsutomu Asakawa 2021-03-02
10811682 Cathode active material, positive electrode for lithium ion secondary battery and lithium ion secondary battery 2020-10-20
10763504 Transition metal-containing hydroxide, and method for producing lithium-containing composite oxide 2020-09-01
10742455 Equalizer adjusting device, equalizer adjusting method, receiver, and signal transmitting and receiving system 2020-08-11
10608165 Piezoelectric element and liquid ejecting head Koichi Morozumi, Kazuya Kitada, Harunobu KOIKE, Koji Sumi 2020-03-31
10427981 Piezoelectric material, method of manufacturing the same, piezoelectric element, and piezoelectric element application device Koji Sumi, Kazuya Kitada, Yasuaki Hamada, Tetsuya Isshiki, Satoshi Kimura +2 more 2019-10-01
10355196 Piezoelectric element, piezoelectric element application device, and method of manufacturing piezoelectric element Kazuya Kitada, Koji Sumi 2019-07-16