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USPTO Patent Rankings Data through Dec 31, 2025
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Futoshi Kuniyoshi — 40 Patents

Hitachi: 31 patents #867 of 28,497Top 4%
NCNeomax Co.: 3 patents #21 of 95Top 25%
PRProterial: 3 patents #41 of 267Top 20%
SCSumitomo Special Metals Co.: 3 patents #65 of 262Top 25%
Tokyo, JP: #2,877 of 90,295 inventorsTop 4%
Overall (All Time): #78,057 of 4,157,543Top 2%
40 Patents All Time
Futoshi Kuniyoshi has been granted 40 US patents while listed as an inventor at Hitachi. The first was granted in 2002 and the most recent in August 2025. Futoshi Kuniyoshi ranks #78,057 of 4,157,543 US inventors in our database (top 1.9%). Patent records list Futoshi Kuniyoshi in Tokyo, JP.

Issued Patents All Time

Showing 1–25 of 40 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12397347 Method for manufacturing R-T-B based sintered magnet, and R-T-B based sintered magnet Nobuhiko Fujimori, Tohru Obata, Kazuhiro Sonoda, Daisuke Furusawa, Tomohito Maki +2 more 2025-08-26
11823824 R-T-B sintered magnet — 2023-11-21
11738390 Method of producing R-T-B sintered magnet Shuji Mino 2023-08-29
11239011 Sintered R-T-B based magnet — 2022-02-01
11177069 Method for producing R-T-B system sintered magnet — 2021-11-16
11174537 R-T-B sintered magnet — 2021-11-16
11062843 Method for producing sintered R-T-B based magnet and diffusion source — 2021-07-13
11062844 Method of producing R-T-B sintered magnet Shuji Mino 2021-07-13
11037724 Method for producing R-T-B sintered magnet — 2021-06-15
10984930 Method for producing sintered R—T—B based magnet and diffusion source — 2021-04-20
10923256 R-T-B-based sintered magnet and method for producing same Teppei Satoh, Rintaro Ishii, Takeshi Nishiuchi, Noriyuki Nozawa 2021-02-16
10847290 R-T-B based sintered magnet Takeshi Nishiuchi, Takayuki Kanda, Rintaro Ishii, Teppei Satoh 2020-11-24
10658108 Method for producing R-T-B based sintered magnet Ryouichi Yamagata, Rintaro Ishii, Teppei Satoh 2020-05-19
10639720 Diffusion treatment device and method for manufacturing R-T-B system sintered magnet using same — 2020-05-05
10643789 Method for producing R-T-B sintered magnet — 2020-05-05
10446306 Method for manufacturing R-T-B based sintered magnet Teppei Satoh, Rintaro Ishii, Ryouichi Yamagata 2019-10-15
10388442 R-T-B based sintered magnet and method for producing R-T-B based sintered magnet Rintaro Ishii, Teppei Satoh 2019-08-20
10242781 Method for manufacturing R-T-B based sintered magnet Teppei Satoh, Rintaro Ishii 2019-03-26
10217562 Method for manufacturing R-T-B based sintered magnet Ryouichi Yamagata 2019-02-26
9837193 R-T-B sintered magnet — 2017-12-05
9613748 RH diffusion source, and method for producing R-T-B-based sintered magnet using same — 2017-04-04
9484151 Method of producing R-T-B sintered magnet — 2016-11-01
9478332 Method for producing R-T-B sintered magnet Rintaro Ishii, Ryouichi Yamagata 2016-10-25
9415444 Process for production of R-T-B based sintered magnets and R-T-B based sintered magnets — 2016-08-16
9368276 Method for producing R-T-B-based sintered magnets — 2016-06-14

Nearby-Ranked Inventors

Kazumasa Takata40
Yunchao Gong40
Martin Zebhauser40
Stephen E. Delaporte40
Koichi Nagami40
Joel R. Spurlock40
Rémy Lassalle-Balier40
Katsuhiro Morikawa40
Tomohiro Sugimoto40