Inventor
DUFFIELD DAVID JAY
US15 patents
⚠️ This page may combine multiple inventors who share the name “DUFFIELD DAVID JAY”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
THOMSON LICENSING
10 patentsUS7356848B1Apr 8, 2008
System and method of verifying authorization for communicating protected content
THOMSON LICENSING18 citations84
US7254236B1Aug 7, 2007
Method and system for handling two CA systems in a same receiver
THOMSON LICENSING13 citations82
US7469420B2Dec 23, 2008
Key transport tamper protection
THOMSON LICENSING17 citations81
US7420649B2Sep 2, 2008
Theater identification system utilizing identifiers projected through a screen
THOMSON LICENSING7 citations72
US7289644B2Oct 30, 2007
Anti-piracy coding of motion pictures
THOMSON LICENSING9 citations71
US8024752B2Sep 20, 2011
Method and apparatus for permitting unconfirmed viewing time with addressable pay TV
THOMSON LICENSING4 citations62
US7295281B2Nov 13, 2007
System and method for adaptive marking and coding of film prints
THOMSON LICENSING3 citations61
US8358384B2Jan 22, 2013
Reduced rainbow artifacts in digital light projection systems
THOMSON LICENSING1 citations51
US7551837B2Jun 23, 2009
Sequence counter for an audio visual stream
THOMSON LICENSING1 citations51
US7936898B2May 3, 2011
Watermarking of motion picture prints
THOMSON LICENSING0 citations42