Granted Patent
Utility
US 6,513,117 · App. 09/168,351
Certificate handling for digital rights management system
Inventors:
Marc Tarpenning, Ben Kavanah, Brian Slesinsky
Patented Case
View Patent ↗
Granted: Jan 28, 2003
Filed: Oct 7, 1998
Inventors
Marc Tarpenning
Ben Kavanah
Brian Slesinsky
Assignee (at issue)
Gemstar Development Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.