Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
SK

Sachiko Kumai — 1 Patent

SISeiko Instruments: 1 patents #836 of 1,437Top 60%
Chiba, JP: #3,922 of 6,266 inventorsTop 65%
Overall (All Time): #2,406,284 of 4,157,543Top 60%
1 Patents All Time
Sachiko Kumai has been granted 1 US patent while listed as an inventor at Seiko Instruments. All of these patents were granted in 2001. Sachiko Kumai ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Sachiko Kumai in Chiba, JP.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6222604 Display device and method of manufacturing the same Mitsuru Suginoya, Kazuo Shimada 2001-04-24