Inventor · disambiguated record
John O. Ryan
Also filed as: RYAN JOHN · RYAN JOHN O · RYAN JOHN OLIVER
77 granted patents·4 pending applications·4,824 citations·filing 1979–2020
99Inventor score
Top patents by PatentIndex Score
81 records- 0199US5513260AMethod and apparatus for copy protection for various recording mediaMACROVISION CORP·Filed 1994·Granted Apr 30, 1996·415 cites·25 claims
- 0298US5659613AMethod and apparatus for copy protection for various recording media using a video finger printMACROVISION CORP·Filed 1995·Granted Aug 19, 1997·215 cites·10 claims
- 0398US5574787AApparatus and method for comprehensive copy protection for video platforms and unprotected source materialFiled 1994·Granted Nov 12, 1996·336 cites·43 claims
- 0498US5406626ARadio receiver for information dissemenation using subcarrierMACROVISION CORP·Filed 1993·Granted Apr 11, 1995·282 cites·21 claims
- 0598US5315448ACopy protection for hybrid digital video tape recording and unprotected source materialMACROVISION CORP·Filed 1993·Granted May 24, 1994·360 cites·49 claims
- 0697US5751806AAudio information dissemination using various transmission modesCOMMAND AUDIO CORP·Filed 1996·Granted May 12, 1998·248 cites·28 claims
- 0797US5524051AMethod and system for audio information dissemination using various modes of transmissionCOMMAND AUDIO CORP·Filed 1994·Granted Jun 4, 1996·272 cites·47 claims
- 0897US4631603AMethod and apparatus for processing a video signal so as to prohibit the making of acceptable video tape recordings thereofMACROVISION·Filed 1985·Granted Dec 23, 1986·209 cites·20 claims
- 0996US5754649AVideo media security and tracking systemMACROVISION CORP·Filed 1997·Granted May 19, 1998·169 cites·2 claims
- 1096US5590195AInformation dissemination using various transmission modesCOMMAND AUDIO CORP·Filed 1994·Granted Dec 31, 1996·174 cites·43 claims
- 1196US4907093AMethod and apparatus for preventing the copying of a video programMACROVISION CORP·Filed 1988·Granted Mar 6, 1990·76 cites·52 claims
- 1296US4577216AMethod and apparatus for modifying the color burst to prohibit videotape recordingMACROVISION·Filed 1983·Granted Mar 18, 1986·115 cites·14 claims
- 1395US6330334B1Method and system for information dissemination using television signalsCOMMAND AUDIO CORP·Filed 2000·Granted Dec 11, 2001·79 cites·48 claims
- 1495US5754648AVideo media security and tracking systemMACROVISION CORP·Filed 1997·Granted May 19, 1998·120 cites·15 claims
- 1595US4937679ADual deck video recording apparatus having enhanced copy protection and method for providing enhanced copy protection to such a recording apparatusMACROVISION·Filed 1988·Granted Jun 26, 1990·65 cites·16 claims
- 1695US4819098AMethod and apparatus for clustering modifications made to a video signal to inhibit the making of acceptable videotape recordingsMACROVISION CORP·Filed 1987·Granted Apr 4, 1989·120 cites·13 claims
- 1793US9549226B2Method and apparatus for reducing and restoring the effectiveness of a commercial skip systemROVI SOLUTIONS CORP·Filed 2015·Granted Jan 17, 2017·7 cites·20 claims
- 1893US6374036B1Method and apparatus for copy-once watermark for video recordingMACROVSION CORP·Filed 1998·Granted Apr 16, 2002·265 cites·57 claims
- 1993US5130810AMethod and apparatus for processing a video signal so as to prohibit the making of acceptable videotape recordingsMACROVISION CORP·Filed 1986·Granted Jul 14, 1992·51 cites·15 claims
- 2093US4695901AMethod and apparatus for removing pseudo-sync and/or agc pulses from a video signalMACROVISION·Filed 1986·Granted Sep 22, 1987·100 cites·31 claims
- 2191US7298962B2Method and apparatus for reducing and restoring the effectiveness of a commercial skip systemMACROVISION CORP·Filed 2003·Granted Nov 20, 2007·31 cites·72 claims
- 2289US10536756B2Method and apparatus for reducing and restoring the effectiveness of a commercial skip systemROVI SOLUTIONS CORP·Filed 2018·Granted Jan 14, 2020·3 cites·20 claims
- 2389US5583936AVideo copy protection process enhancement to introduce horizontal and vertical picture distortionsMACROVISION CORP·Filed 1993·Granted Dec 10, 1996·67 cites·92 claims
- 2489US4626890AMethod and apparatus for removing phase modulation from the color burstMACROVISION·Filed 1984·Granted Dec 2, 1986·49 cites·6 claims
- 2588US7620178B2Copy protection for video signal added pulsesMACROVISION CORP·Filed 2007·Granted Nov 17, 2009·8 cites·7 claims
- 2687US6542609B1Method and apparatus for scrambling a high definition television signalMACROVISION CORP·Filed 2000·Granted Apr 1, 2003·33 cites·25 claims
- 2785US5633927AVideo copy protection process enhancement to introduce horizontal and vertical picture distortionsMACROVISION CORP·Filed 1995·Granted May 27, 1997·45 cites·12 claims
- 2884US5784523AMethod and apparatus for defeating effects of color burst modifications to a video signalMACROVISION CORP·Filed 1997·Granted Jul 21, 1998·66 cites·62 claims
- 2982US6950520B1Method and apparatus for carrying data in a video signal so that the data is not recordedMACROVISION CORP·Filed 2000·Granted Sep 27, 2005·22 cites·12 claims
- 3082US6381367B1Method and apparatus for compression compatible video fingerprintingMACROVISION CORP·Filed 1997·Granted Apr 30, 2002·78 cites·31 claims
- 3182US4354243ATwo dimensional interpolation circuit for spatial and shading error corrector systemsAMPEX·Filed 1980·Granted Oct 12, 1982·34 cites·23 claims
- 3278US7907727B2System and method for allowing copying or distribution of a copy protected signalROVI SOLUTIONS CORP·Filed 2005·Granted Mar 15, 2011·4 cites·47 claims
- 3378US6590979B1Method and apparatus for compression compatible video scramblingMACROVISION CORP·Filed 1997·Granted Jul 8, 2003·57 cites·29 claims
- 3478US6091822AMethod and apparatus for recording scrambled video audio signals and playing back said video signal, descrambled, within a secure environmentMACROVISION CORP·Filed 1998·Granted Jul 18, 2000·63 cites·47 claims
- 3577US5590194AMethod of and apparatus for scrambling a video signal with full network transmission and recording capabilityMACROVISION CORP·Filed 1994·Granted Dec 31, 1996·40 cites·46 claims
- 3677US5504815AMethod and apparatus for scrambling and descramblingMACROVISION CORP·Filed 1995·Granted Apr 2, 1996·36 cites·6 claims
- 3776US6327422B1Method and apparatus for modifying the effects of color burst modifications to a video signalMACROVISION CORP·Filed 1998·Granted Dec 4, 2001·35 cites·18 claims
- 3875US6188832B1Method and apparatus for modifications made to a video signal to inhibit the making of acceptable videotape recordingsMACROVISION CORP·Filed 1997·Granted Feb 13, 2001·49 cites·14 claims
- 3974US9060182B2Method and apparatus for reducing and restoring the effectiveness of a commercial skip systemQUAN RONALD·Filed 2012·Granted Jun 16, 2015·1 cites·18 claims
- 4074US8254756B2Method and apparatus for reducing and restoring the effectiveness of a commercial skip systemQUAN RONALD·Filed 2007·Granted Aug 28, 2012·2 cites·11 claims
- 4173US5844988AMethod and apparatus for scrambling and descrambling of video signal with edge fillMACROVISION CORP·Filed 1995·Granted Dec 1, 1998·28 cites·10 claims
- 4273US5438620AMethod and apparatus for scrambling and descrambling of video signal with edge fillMACROVISION CORP·Filed 1994·Granted Aug 1, 1995·21 cites·12 claims
- 4372US6701062B1Generational copy control of a video signalMACROVISION CORP·Filed 1999·Granted Mar 2, 2004·53 cites·17 claims
- 4471US6600873B1Method and apparatus for detecting modified color burst signals to prevent the copying of a video programMACROVISION CORP·Filed 1998·Granted Jul 29, 2003·42 cites·14 claims
- 4570US7764790B2Scaling independent technique for watermarking imagesROVI SOLUTIONS CORP·Filed 2003·Granted Jul 27, 2010·7 cites·51 claims
- 4670US5608799AMethod and apparatus for scrambling and descrambling of video signal with edge fillMACROVISION CORP·Filed 1995·Granted Mar 4, 1997·24 cites·5 claims
- 4770US4333108AApparatus and method for transmitting a pulse width modulated audio signal on a video signalAMPEX·Filed 1980·Granted Jun 1, 1982·18 cites·15 claims
- 4868US5058157AMethod and apparatus for encrypting and decrypting time domain signalsMACROVISION CORP·Filed 1989·Granted Oct 15, 1991·18 cites·18 claims
- 4967US7784103B2Method and apparatus for storing copy protection information separately from protected contentROVI SOLUTIONS CORP·Filed 2004·Granted Aug 24, 2010·6 cites·9 claims
- 5067US4360747AVoltage controlled subcarrier phase shifterAMPEX·Filed 1980·Granted Nov 23, 1982·14 cites·10 claims
Showing the top 50 of 81 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →