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USPTO Patent Rankings Data through Dec 31, 2025
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Seiichi Kashimura — 16 Patents

PRProterial: 7 patents #5 of 267Top 2%
Hitachi: 6 patents #6,585 of 28,497Top 25%
HCHitachi Cable: 2 patents #313 of 1,086Top 30%
NTNTT: 1 patents #2,911 of 4,871Top 60%
Tokyo, JP: #9,687 of 90,295 inventorsTop 15%
Overall (All Time): #284,196 of 4,157,543Top 7%
16 Patents All Time
Seiichi Kashimura has been granted 16 US patents while listed as an inventor at Proterial. The first was granted in 1993 and the most recent in November 2025. Seiichi Kashimura ranks #284,196 of 4,157,543 US inventors in our database (top 6.8%). Patent records list Seiichi Kashimura in Tokyo, JP.

Patents per Year

Patents granted per year, 1993 to 2025Bar chart with a peak of 3 patents in 2023.peak 31993: 1 patents19932008: 1 patents20082014: 1 patents20142019: 1 patents20192020: 1 patents20202021: 1 patents20212022: 2 patents20222023: 3 patents20232024: 2 patents20242025: 3 patents2025

Issued Patents All Time

Showing 1–16 of 16 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12476449 Boot-attached cable and medical diagnostic device Kazufumi Suenaga, Takumi Watanabe 2025-11-18
12385840 Resin composition quality controlling method, cable and tube quality controlling method, determination device, inspection system, and cable and tube Kazufumi Suenaga 2025-08-12
12372471 Resin composition quality controlling method, cable and tube quality controlling method, determination device, inspection system, cable, and tube Kazufumi Suenaga, Koki Hirano 2025-07-29
12073964 Laminate structure, cable and tube Kazufumi Suenaga, Tamotsu Kibe, Kanako SUGANUMA 2024-08-27
11891535 Molded article and hollow tube Masamichi Kishi, Naoto Teraki, Takanobu Watanabe, Yuriko Kiyokane 2024-02-06
11845881 Cable and medical hollow tube Masamichi Kishi, Naoto Teraki, Takanobu Watanabe, Yuriko Kiyokane 2023-12-19
11779193 Molded article and hollow tube Masamichi Kishi, Naoto Teraki, Takanobu Watanabe, Yuriko Kiyokane 2023-10-10
11655587 Medical hollow tube Masamichi Kishi, Takanobu Watanabe, Kimika Kudo, Masashi Arai 2023-05-23
11401439 Molded article and hollow tube Masamichi Kishi, Naoto Teraki, Takanobu Watanabe, Yuriko Kiyokane 2022-08-02
11286615 Cable and medical hollow tube Masamichi Kishi, Takanobu Watanabe, Kimika Kudo, Masashi Arai 2022-03-29
11041091 Cable and medical hollow tube Masamichi Kishi, Naoto Teraki, Takanobu Watanabe, Yuriko Kiyokane 2021-06-22
10643762 Insulated wire and cable Koki Hirano, Masafumi Kaga, Tamotsu Kibe, Makoto Iwasaki 2020-05-05
10258765 Cable and medical hollow tube Takanobu Watanabe, Kimika Kudo, Masamichi Kishi 2019-04-16
8811278 Low/high frequency shared leakage antenna, base station apparatus and close-range detection system using the antenna Ken Takei, Kazuo Tamura, Nobuaki Kitano, Hiroyuki Hori, Yasuo Ishikawa 2014-08-19
7415183 Silica based glass waveguide and optical module using the same Hiroaki Okano 2008-08-19 $272,000
5206925 Rare earth element-doped optical waveguide and process for producing the same Masataka Nakazawa, Yasuo Kimura, Katsuyuki Imoto, Toshikazu Kamoshida, Fujio Kikuchi 1993-04-27 $68,000

Frequent Collaborators

Takanobu Watanabe8 shared
Masamichi Kishi8 shared
Yuriko Kiyokane5 shared
Naoto Teraki5 shared
Kimika Kudo3 shared
Kazufumi Suenaga3 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