Granted Patent
Utility
US 6,735,313 · App. 09/307,643
Cryptographic method and apparatus for restricting access to transmitted programming content using hash functions and program identifiers
Inventors:
Daniel Bleichenbacher, Avishai Wool
Patented Case
View Patent ↗
Granted: May 11, 2004
Filed: May 7, 1999
Inventors
Daniel Bleichenbacher
Avishai Wool
Assignee (at issue)
LUCENT TECHNOLOGIES INC.
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.