Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Ken-ichi Mitsuzuka — 2 Patents

Sony: 2 patents #13,023 of 25,231Top 55%
JSJfe Steel: 1 patents #825 of 1,401Top 60%
NCNkk Co.: 1 patents #579 of 1,173Top 50%
Tokyo, JP: #44,108 of 90,295 inventorsTop 50%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
Ken-ichi Mitsuzuka has been granted 2 US patents while listed as an inventor at Sony. The first was granted in 2003 and the most recent in June 2006. Ken-ichi Mitsuzuka ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Ken-ichi Mitsuzuka in Tokyo, JP.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
7056599 Steel sheet for magnetic shields and manufacturing method thereof Reiko Sugihara, Tatsuhiko Hiratani, Hideki Matsuoka, Yasushi Tanaka, Satoshi Kodama +2 more 2006-06-06 $759,000
6635361 Magnetic shielding steel sheet and method for producing the same Reiko Sugihara, Tatsuhiko Hiratani, Hideki Matsuoka, Yasushi Tanaka, Satoshi Kodama +2 more 2003-10-21 $832,000