1
John O Ryan: Apparatus and method for comprehensive copy protection for video platforms and unprotected source material. Gerow D Brill, November 12, 1996: US05574787 (199 worldwide citation)

A video recording platform prevents both analog and digital copying of copy protected material. The platform may input and output both analog and digital video signals. At said analog input, a detector detects conventional copy protection in the analog input video, and in response disables recording ...


2
John O Ryan: Method and apparatus for copy protection for various recording media. Macrovision Corporation, Gerow D Brill, April 30, 1996: US05513260 (193 worldwide citation)

A method and apparatus for copyright protection for various recording media such as compact discs (CDs) uses a combination of symmetrical and asymmetrical data encryption to permit the player to handle either copy-protected or non-copy-protected media, in a manner that is extremely difficult to comp ...


3
John O Ryan: Method and system for audio information dissemination using various modes of transmission. Command Audio Corporation, Gerow D Brill, June 4, 1996: US05524051 (184 worldwide citation)

A system and method of information dissemination that permits the user to listen to the specific content of information when and where he or she wants to. A radio or television receiver system receives information from an FM subcarrier, a television vertical blanking interval transmission, an active ...


4
John O Ryan: Copy protection for hybrid digital video tape recording and unprotected source material. Macrovision Corporation, Skjerven Morrill MacPherson Franklin & Friel, May 24, 1994: US05315448 (174 worldwide citation)

A hybrid digital/analog video recorder prevents both analog and digital copying. The recorder (including a digital tape deck) inputs and outputs both analog and digital video signals. At the analog input, a detector detects conventional copy protection in the analog input video, and in response disa ...


5
John O Ryan, Patrice Capitant, Clayton L Davidson, James Holzgrafe, Kordian J Kurowski, Andrew Mellows, Tony Forrest Rodriquez: Method and apparatus for copy-once watermark for video recording. Macrovsion Corporation, Digimarc Corporation, Norman R Klivan, Victor Okumoto, April 16, 2002: US06374036 (165 worldwide citation)

Method and apparatus for “copy-once” of a digital video signal uses a watermark in the video signal. The embedded watermark has two versions: one indicates copy-never and a second indicates copy-once, the difference being a single watermark bit. The watermark carries additional bits representing a d ...


6
John O Ryan: Radio receiver for information dissemenation using subcarrier. Macrovision Corporation, Norman R Klivans Jr, Gerow D Brill, Skjerven Morrill MacPherson Franklin & Friel, April 11, 1995: US05406626 (153 worldwide citation)

A radio receiver receives FM subcarrier transmissions, and stores the transmitted textual information in a random access memory. The information is typically news, weather, sports, entertainment or other information of interest. A user interface allows selection from the memory of the stored informa ...


7
John O Ryan: Audio information dissemination using various transmission modes. Command Audio Corporation, Norman R Klivans, Skjerven Morrill MacPherson Franklin & Friel, May 12, 1998: US05751806 (148 worldwide citation)

A system and method of information dissemination that permits the user to listen to the specific content of information when and where he or she wants to. A radio or television receiver system receives information from a FM subcarrier, a television vertical blanking interval transmission, a televisi ...


8
John O Ryan: Information dissemination using various transmission modes. Command Audio Corporation, Gerow D Brill, December 31, 1996: US05590195 (119 worldwide citation)

A system and method of information dissemination that permits the user to listen to the specific content of information when and where he or she wants to. A radio or television receiver system receives information from an FM subcarrier, a television vertical blanking interval transmission, a televis ...


9
Gregory C Copeland, John O Ryan: Method and apparatus for copy protection for various recording media using a video finger print. Macrovision Corporation, Gerow Brill, August 19, 1997: US05659613 (111 worldwide citation)

A method and apparatus for copyright protection for various recording media such as Digital Video Discs (DVDs) uses a combination of a Video Finger Print Signal and an Authenticating Signature to permit the player to handle either copy-protected or non-copy-protected media, in a manner that is diffi ...


10
John O Ryan: Method and apparatus for processing a video signal so as to prohibit the making of acceptable video tape recordings thereof. Macrovision, C Michael Zimmerman, December 23, 1986: US04631603 (105 worldwide citation)

A video signal is modified so that a television receiver will still provide a normal color picture from the modified video signal while a videotape recording of the modified video signal produces generally unacceptable pictures. This invention relies on the fact that typical videocassette recorder a ...