Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Masataka Iwakuma — 5 Patents

UNUnknown: 7 patents #1,646 of 83,584Top 2%
FUFujikura: 3 patents #385 of 1,407Top 30%
FCFuji Electric Co.: 3 patents #735 of 175Top 420%
RIRailway Technical Research Institute: 2 patents #23 of 233Top 10%
KUKyushu University, National University: 2 patents #118 of 767Top 20%
KCKyushu Electric Power Co.: 1 patents #56 of 151Top 40%
Fukuoka, JP: #695 of 3,381 inventorsTop 25%
Overall (All Time): #907,971 of 4,157,543Top 25%
5 Patents All Time
Masataka Iwakuma has been granted 5 US patents while listed as an inventor at Unknown. The first was granted in 2008 and the most recent in December 2024. Masataka Iwakuma ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list Masataka Iwakuma in Fukuoka, JP.

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12184153 Superconducting induction rotating machine, and superconducting drive force generating system using said superconducting induction rotating machine Teruo Izumi 2024-12-31 $751,000
8880135 Low alternating-current loss oxide superconductor and fabricating method thereof Kenji Suzuki, Saburo Hoshi, Junko Matsuda, Teruo Izumi, Yuh Shiohara 2014-11-04
7777602 Superconducting wire and superconducting coil made therewith Kazuo Funaki, Takanobu Kisu, Akira Tomioka, Toshio Uede, Hiroshi Fuji +2 more 2010-08-17 $4,695,000
7453340 Superconducting wire and superconducting coil employing it Kazuo Funaki, Takanobu Kisu, Akira Tomioka, Toshio Uede, Hiroshi Fuji +2 more 2008-11-18 $4,805,000
7394338 Superconducting coil Akira Tomioka, Masayuki Konno, Hiroshi Fuji, Kenji Suzuki, Teruo Izumi +2 more 2008-07-01 $7,630,000