Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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William C. Severson — 1 Patent

UNUnknown: 1 patents #29,356 of 83,584Top 40%
Seattle, WA: #14,256 of 21,776 inventorsTop 70%
Washington: #48,569 of 76,902 inventorsTop 65%
Overall (All Time): #2,406,284 of 4,157,543Top 60%
1 Patents All Time
William C. Severson has been granted 1 US patent while listed as an inventor at Unknown. All of these patents were granted in 1990. William C. Severson ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list William C. Severson in Seattle, WA, US.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4915401 Child carrier usable as backpack, stroller and recliner William H. Hamilton 1990-04-10