Wilmington, Delaware
United States
3
2008-01-24
2
2007-01-09
These are the the leading inventors for applications assigned to CONTENTGUARD HOLDING, INC.:
CONTENTGUARD HOLDING, INC. based in Wilmington, US has been assigned the rights to these inventions. The list includes both Pending Applications and Patent Grants:
Method and system for subscription digital rights management
#2 | 2005-08-25 ✅ Patent 7,162,633 granted on 2007-01-09Method and apparatus for hierarchical assignment of rights to documents and documents having such rights
#3 | 2005-07-21 ✅ Patent 6,959,290 granted on 2005-10-25Method and apparatus for tracking states of digital works
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