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USPTO Patent Rankings Data through Dec 31, 2025
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William C. Sisco — 4 Patents

SISimpson Industries: 3 patents #2 of 17Top 15%
Marshall, MI: #46 of 157 inventorsTop 30%
Michigan: #22,248 of 86,293 inventorsTop 30%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
William C. Sisco has been granted 4 US patents while listed as an inventor at Simpson Industries. The first was granted in 1993 and the most recent in September 2002. William C. Sisco ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list William C. Sisco in Marshall, MI, US.

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6450890 Minimal mass hollow balance shaft Michael D. Hendrian, Steven J. Chevalier 2002-09-17
6244239 Integrated front end accessory drive system Steve Chevalier 2001-06-12
5483932 Hollow balance shaft Ronald S. Friedman 1996-01-16 $1,321,000
5231893 Dual mode damper Timothy M. Haylett 1993-08-03 $2,329,000