WS

William E. Stelzel

Microsoft: 2 patents #17,506 of 40,388Top 45%
Overall (All Time): #2,117,233 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
7698223 Pluggable file-based digital rights management API layer for applications and engines Andrew D. Padawer, Katharine Holdsworth, Miguel A. Claudio, Scott R. Shell 2010-04-13
7657574 Persistent storage file change tracking Anoop Gupta, Anh P. Tran, Gary W. Hall 2010-02-02