Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Yukio Ejiri — 2 Patents

RYRyobi: 2 patents #111 of 309Top 40%
Fuchu, JP: #426 of 926 inventorsTop 50%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
Yukio Ejiri has been granted 2 US patents while listed as an inventor at Ryobi. All of these patents were granted in 2002. Yukio Ejiri ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Yukio Ejiri in Fuchu, JP.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6453812 Ink supply control device for printing machines and a method therefor Hideki Ikeda, Hiroshi Sugimoto 2002-09-24
6389968 Ink supply control device for printing machines and a method therefor Hiroshi Sugimoto, Hideki Ikeda 2002-05-21