Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Yoshio Tomizawa — 6 Patents

OCOlympus Optical Co.: 4 patents #789 of 2,334Top 35%
TCT.Rad Co.: 2 patents #8 of 62Top 15%
NCNippon Chemical Plant Consultant Co.: 1 patents #2 of 13Top 20%
Tama, JP: #114 of 402 inventorsTop 30%
Overall (All Time): #779,687 of 4,157,543Top 20%
6 Patents All Time
Yoshio Tomizawa has been granted 6 US patents while listed as an inventor at Olympus Optical Co.. The first was granted in 1982 and the most recent in April 2009. Yoshio Tomizawa ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Yoshio Tomizawa in Tama, JP.

Patents per Year

Patents granted per year, 1982 to 2009Bar chart with a peak of 3 patents in 1983.peak 31982: 1 patents19821983: 3 patents19832009: 2 patents2009

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
7517507 Steam reformer Takeshi Kuwabara, Jun Ono, Yasushi Yoshino 2009-04-14
7503946 Autooxidation internal heating type steam reforming system Takeshi Kuwabara, Yasushi Yoshino, Jun Ono, Shigeki Kobayashi, Saburo Makuro 2009-03-17
4420216 Connecting device Kazuyasu Motoyama, Toshihiro Nakao, Mitsuo Nasu 1983-12-13
4393420 Tape run speed-changing circuit 1983-07-12
4370549 Electronic counter circuit for tape recorder 1983-01-25
4351009 Apparatus for moving the pinch roller and the magnetic head of a tape recorder Hajime Osada, Akiteru Kimura, Tokuo Shimizu, Goro Kitajima, Makoto Kondo +2 more 1982-09-21