Assignee
MACROVISION CORP
US132 patents
Top patents by PatentIndex Score
US5659613AAug 19, 1997
Method and apparatus for copy protection for various recording media using a video finger print
MACROVISION CORP215 citations99
US5513260AApr 30, 1996
Method and apparatus for copy protection for various recording media
MACROVISION CORP415 citations99
US5406626AApr 11, 1995
Radio receiver for information dissemenation using subcarrier
MACROVISION CORP282 citations99
US5315448AMay 24, 1994
Copy protection for hybrid digital video tape recording and unprotected source material
MACROVISION CORP360 citations99
US5739864AApr 14, 1998
Apparatus for inserting blanked formatted fingerprint data (source ID, time/date) in to a video signal
MACROVISION CORP149 citations98
US6510516B1Jan 21, 2003
System and method for authenticating peer components
MACROVISION CORP105 citations97
US5754648AMay 19, 1998
Video media security and tracking system
MACROVISION CORP120 citations97
US5754649AMay 19, 1998
Video media security and tracking system
MACROVISION CORP169 citations97
US7603022B2Oct 13, 2009
Networked personal video recording system
MACROVISION CORP63 citations96
US7213228B2May 1, 2007
Methods and apparatus for implementing a remote application over a network
MACROVISION CORP120 citations96
US6931536B2Aug 16, 2005
Enhanced copy protection of proprietary material employing multiple watermarks
MACROVISION CORP84 citations96
US6590979B1Jul 8, 2003
Method and apparatus for compression compatible video scrambling
MACROVISION CORP57 citations96
US6501842B2Dec 31, 2002
Method and apparatus for modifying a video signal by back porch lowering
MACROVISION CORP26 citations96
US6381367B1Apr 30, 2002
Method and apparatus for compression compatible video fingerprinting
MACROVISION CORP78 citations96
US6381747B1Apr 30, 2002
Method for controlling copy protection in digital video networks
MACROVISION CORP407 citations96
US6327422B1Dec 4, 2001
Method and apparatus for modifying the effects of color burst modifications to a video signal
MACROVISION CORP35 citations96
US6285765B1Sep 4, 2001
Method and apparatus for reducing effects of copy protection of composite video signal
MACROVISION CORP26 citations96
US6018374AJan 25, 2000
Method and system for preventing the off screen copying of a video or film presentation
MACROVISION CORP228 citations96
US5953417ASep 14, 1999
Method and apparatus for digitally removing or defeating effects of copy protection signals from a video signal
MACROVISION CORP60 citations96
US5844988ADec 1, 1998
Method and apparatus for scrambling and descrambling of video signal with edge fill
MACROVISION CORP28 citations96
US5784523AJul 21, 1998
Method and apparatus for defeating effects of color burst modifications to a video signal
MACROVISION CORP66 citations96
US5748733AMay 5, 1998
Method and apparatus to reduce effects of certain copy protection purses within a video signal
MACROVISION CORP51 citations96
US5668603ASep 16, 1997
Video finger print method and apparatus
MACROVISION CORP64 citations96
US5633927AMay 27, 1997
Video copy protection process enhancement to introduce horizontal and vertical picture distortions
MACROVISION CORP45 citations96
US5625691AApr 29, 1997
Method and apparatus to defeat certain copy protection pulses within a video signal
MACROVISION CORP28 citations96
US5504815AApr 2, 1996
Method and apparatus for scrambling and descrambling
MACROVISION CORP36 citations96
US5229735AJul 20, 1993
Wide frequency deviation voltage controlled crystal oscillator having plural parallel crystals
MACROVISION CORP78 citations96
US4907093AMar 6, 1990
Method and apparatus for preventing the copying of a video program
MACROVISION CORP76 citations96
US4819098AApr 4, 1989
Method and apparatus for clustering modifications made to a video signal to inhibit the making of acceptable videotape recordings
MACROVISION CORP120 citations96
US7360252B1Apr 15, 2008
Method and apparatus for secure distribution of software
MACROVISION CORP62 citations95
US7298962B2Nov 20, 2007
Method and apparatus for reducing and restoring the effectiveness of a commercial skip system
MACROVISION CORP31 citations95
US6999946B2Feb 14, 2006
Method for computer network operation providing basis for usage fees
MACROVISION CORP30 citations95
US6836549B1Dec 28, 2004
Method and apparatus for synthesizing and reducing the effects of video copy protection signals
MACROVISION CORP56 citations95
US5583936ADec 10, 1996
Video copy protection process enhancement to introduce horizontal and vertical picture distortions
MACROVISION CORP67 citations95
US7574723B2Aug 11, 2009
Home media network
MACROVISION CORP99 citations94
US6553127B1Apr 22, 2003
Method and apparatus for selective block processing
MACROVISION CORP170 citations94
US6516132B1Feb 4, 2003
Method and apparatus for improving the effects of color burst modifications to a video signal
MACROVISION CORP49 citations94
US5194965AMar 16, 1993
Method and apparatus for disabling anti-copy protection system in video signals
MACROVISION CORP107 citations94
US5157510AOct 20, 1992
Method and apparatus for disabling anti-copy protection system in video signals using pulse narrowing
MACROVISION CORP78 citations94
US7492896B2Feb 17, 2009
Copy protection for video signal using added negative amplitude pulse
MACROVISION CORP13 citations93
US7236683B2Jun 26, 2007
Method and apparatus for providing or enhancing copy protection by adding selected negative-going and positive-going pulses in a video signal HBI
MACROVISION CORP22 citations93
US7085380B2Aug 1, 2006
Method for modifying a copy protected video signal with a negative amplitude pulse
MACROVISION CORP18 citations93
US7050698B1May 23, 2006
Method and apparatus for synthesizing or modifying a copy protection signal using a lowered signal level portion
MACROVISION CORP38 citations93
US7039294B2May 2, 2006
Method and apparatus for modifying the effects of color burst modifications to a video signal
MACROVISION CORP27 citations93
US6826352B1Nov 30, 2004
Dynamic video copy protection system
MACROVISION CORP47 citations93
US6701062B1Mar 2, 2004
Generational copy control of a video signal
MACROVISION CORP53 citations93
US6459795B1Oct 1, 2002
Method and apparatus for enhancing the scrambling of a TV signal via erroneous clamp signals
MACROVISION CORP20 citations93
US6421497B1Jul 16, 2002
Method for locating copy protection pulses within selected video lines of a video signal
MACROVISION CORP32 citations93
US6188832B1Feb 13, 2001
Method and apparatus for modifications made to a video signal to inhibit the making of acceptable videotape recordings
MACROVISION CORP49 citations93
US6173109B1Jan 9, 2001
Method and apparatus for removing or defeating effects of copy protection signals from a video signal
MACROVISION CORP32 citations93
Showing the top 50 of 132 patents by PatentIndex Score.