Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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William S. Schaefer — 2 Patents

IBM: 2 patents #32,909 of 70,183Top 50%
Durham, NC: #1,879 of 4,103 inventorsTop 50%
North Carolina: #18,944 of 45,564 inventorsTop 45%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
William S. Schaefer has been granted 2 US patents while listed as an inventor at IBM. The first was granted in 2009 and the most recent in May 2014. William S. Schaefer ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list William S. Schaefer in Durham, NC, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
8732090 Optimizing procurement spend compliance Pawan R. Chowdhary, Amit Dhurandhar, Markus Ettl, Soumyadip Ghosh, Bruce C. Graves +2 more 2014-05-20 $10,035,000
7548872 Simulation of business transformation outsourcing of sourcing, procurement and payables Les Keay, Craig Alan Keenan, John A. Ricketts 2009-06-16 $12,733,000