Growing community of inventors

Durham, NC, United States of America

William Stephen Schaefer

Average Co-Inventor Count = 5.33

ph-index = 1

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 7

William Stephen SchaeferPawan Raghunath Chowdhary (1 patent)William Stephen SchaeferYu Tang (1 patent)William Stephen SchaeferMarkus Ettl (1 patent)William Stephen SchaeferSoumyadip Ghosh (1 patent)William Stephen SchaeferAmit Dhurandhar (1 patent)William Stephen SchaeferJohn Arthur Ricketts (1 patent)William Stephen SchaeferKarthik Sourirajan (1 patent)William Stephen SchaeferBruce C Graves (1 patent)William Stephen SchaeferLes Keay (1 patent)William Stephen SchaeferCraig Alan Keenan (1 patent)William Stephen SchaeferWilliam Stephen Schaefer (2 patents)Pawan Raghunath ChowdharyPawan Raghunath Chowdhary (61 patents)Yu TangYu Tang (44 patents)Markus EttlMarkus Ettl (37 patents)Soumyadip GhoshSoumyadip Ghosh (25 patents)Amit DhurandharAmit Dhurandhar (25 patents)John Arthur RickettsJohn Arthur Ricketts (23 patents)Karthik SourirajanKarthik Sourirajan (13 patents)Bruce C GravesBruce C Graves (2 patents)Les KeayLes Keay (1 patent)Craig Alan KeenanCraig Alan Keenan (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. International Business Machines Corporation (2 from 164,275 patents)


2 patents:

1. 8732090 - Optimizing procurement spend compliance

2. 7548872 - Simulation of business transformation outsourcing of sourcing, procurement and payables

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as of
1/15/2026
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