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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Kenta Doi — 5 Patents

ULUlvac: 4 patents #97 of 680Top 15%
Yokohama, JP: #16,650 of 49,234 inventorsTop 35%
Overall (All Time): #907,971 of 4,157,543Top 25%
5 Patents All Time
Kenta Doi has been granted 5 US patents while listed as an inventor at Ulvac. The first was granted in 2023 and the most recent in November 2025. Kenta Doi ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list Kenta Doi in Yokohama, JP.

Patents per Year

Patents granted per year, 2023 to 2025Bar chart with a peak of 3 patents in 2025.peak 32023: 1 patents20232024: 1 patents20242025: 3 patents2025

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
12469711 Etching method Takahumi Suzuki, Yasuhiro Morikawa, Tomokazu Nakamura 2025-11-11
12217969 Silicon dry etching method Toshiyuki Sakuishi, Toshiyuki Nakamura, Yasuhiro Morikawa 2025-02-04
12205795 Plasma processing device Taichi Suzuki, Yasuhiro Morikawa, Toshiyuki Nakamura 2025-01-21
12020942 Etching method Taichi Suzuki, Yasuhiro Morikawa, Toshiyuki Nakamura 2024-06-25
11665809 High-frequency power circuit, plasma treatment apparatus, and plasma treatment method Toshiyuki Nakamura 2023-05-30