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| Number | Title | Issue Date |
| 4831448 | Viewing distance sensor for television receiver A viewing distance sensor for television receiver which cannot influence the remote infra-red control function over other electronic equipment positioned in the vicinity of a television receiver and also cannot be influenced by the infra-red signals trans... | 05/16/1989 |
| 4829589 | Anti-tapping system The system relates to a system for preventing unauthorized viewing of CATV etc. wherein each terminal is provided with a terminal own address generator and an auxiliary address generator. The center station allows outputs of respective address generators ... | 05/09/1989 |
| 4792972 | Remote programming of CATV channel authorization unit Method and apparatus is disclosed for programming a CATV channel authorization unit. In a cable television (CATV) system, a CATV transmitter provides a plurality of CATV system channels to a channel authorization unit which in turn supplies only selected ... | 12/20/1988 |
| 4760597 | Technician set-up unit for and method of cable television converter installation and address assignment A technician set-up unit is described for cable television converter installation and address assignment, and a method for using the unit with an addressable television converter. The set-up unit and method permits address assignments to be made in a conv... | 07/26/1988 |
| 4739406 | Method and apparatus for interacting with television images Apparatus for use with a standard television (TV) receiver for superimposing information or images over portions of the broadcast scene. Scynchronization signals are generated by locking onto the horizontal sweep electromagnetic interference (EMI) generat... | 04/19/1988 |
| 4734858 | Data terminal and system for placing orders A pocket size data terminal is described for use by a large number of consumers in a system with which goods or services can be conveniently and automatically ordered. A plurality of data terminals which can automatically dial a local processing center (L... | 03/29/1988 |
| 4710956 | Cable television system A cable television system and method in which each subscriber's converter is located outside the subscriber's premises in an external control unit ("ECU") which also includes several other subscribers' converters. The ECU includes common signal processing... | 12/01/1987 |
| 4688249 | CATV system and method of curtailing reception of unauthorized service channels An "Anti-Piracy" system and method are disclosed which includes an FSK modulator at the head end CATV transmitting location which, in response to data from an addressing computer, randomly issues Anti-Piracy commands (APC) which are transmitted to the set... | 08/18/1987 |
| 4638494 | System for the acquisition of code signals A system for the secure and rapid acquisition of a transmitted acquisition composite code composed from acquisition component codes. The acquisition composite code may, for example, be composed in accordance with a Boolean majority voting rule. Reference ... | 01/20/1987 |
| 4605973 | System, apparatus and method for recording and editing broadcast transmissions A remote recording and editing system for use with a transmitter of broadcast programs, including both television and radio programs, provides for the monitoring of the broadcast transmissions of the transmitter and the generation of recording and editing... | 08/12/1986 |
| 4599646 | Method and apparatus for identifying unauthorized or defective converter/decoder boxes in CATV system A head-end apparatus for a CATV system is provided for facilitating identification of unauthorized or defective converter/decoder boxes in the system. According to the invention, an IF audio signal, representing the aural portion of the program source to ... | 07/08/1986 |
| 4586077 | Switched surface acoustic wave apparatus for controlling cable television services A multichannel surface acoustic wave device is employed to respond to remote channel actuation signals to control the cable television program signals delivered to a subscriber premise.... | 04/29/1986 |
| 4580161 | Cable television subscriber control system including addressable filters having a variable pole A filter for use in a cable television system for filtering out a given channel comprising a two pole filter, said filter including one pole which is fixed at the center frequency to be tuned out and a second variable pole responsive to an input voltage, ... | 04/01/1986 |
| 4577224 | Secure cable television access system with tiering control A poach-resistant system enabling cable television subscribers to receive upon request certain programs otherwise unavailable (i.e., "secure") while precluding such reception by non-requesting subscribers as well as non-subscribers. Before transmission of... | 03/18/1986 |
| 4550341 | Unauthorized observation preventing device for CATV system In a cable television system of the type wherein a cable television signal including free and restricted television channels is subjected to selective frequency conversion at individual terminal units to obtain a desired one of the channels for observatio... | 10/29/1985 |
| 4484218 | Video distribution control system A subscriber distribution terminal is connected to the transmission medium for serving a group of subscribers. Within the distribution control terminal is located a plurality of television converters. A local oscillator in each of the converters is contro... | 11/20/1984 |
| 4475123 | Addressable subscriber cable television system An addressable cable television system includes a transmission cable for transmitting a plurality of television signals driven onto the cable from a head end thereof and a plurality of multiple subscriber controllers coupled to the cable for controlling r... | 10/02/1984 |
| 4461032 | CATV Service controller A remotely located and controlled programming controller for a cable-compatible television receiver is disclosed. Cable head end-generated control signals are provided by wire to the cable TV controller for selectively enabling the reception of subscribed... | 07/17/1984 |
| 4439784 | Power cutting device for terminal units of CATV system In a CATV system, power supplies of television sets associated with all terminal units are cut in response to an instruction contained in a down-data signal supplied by a central facility of the system. It is possible to cut the power supplies of the tele... | 03/27/1984 |
| 4420769 | Device for the automatic editing, at the receiver, of unwanted program material from broadcast electrical signals A device which monitors information contained in broadcast electrical signals and which, when attached to or combined with the circuitry of a television, radio or other receiver, will automatically prevent reception of unwanted material.... | 12/13/1983 |
| 4417278 | Television receiver scrambling system Discloses a proximity detection system mounted in combination with a TV receiver adapted to disrupt the programs of the receiver at the times when objects of at least the dimensions of children are positioned within a designated distance from the televisi... | 11/22/1983 |
| 4358672 | Pay per view television control device A method and apparatus for providing access to an electrically controlled service for perdetermined periods of time employs a dual magnetically striped record medium encoded in a CRB format with data indicative of the periods of time during which access i... | 11/09/1982 |
| 4313132 | Cable TV security means Security means for cable television operators includes an enabling circuit which is located outside of the subscriber premises and is connected in circuit through the television cable with the power supply of the subscriber's cable television converter lo... | 01/26/1982 |
| 4286288 | Apparatus and method for tamper resistant channel attenuation in subscription television converter A tamper resistant subscription television converter is made by connecting a bandstop filter in the Radio Frequency circuit of the converter. The filter, for attenuating one or more preselected subscription television channels is connected in series at a ... | 08/25/1981 |
| 4268859 | High-security cable television access system A poach-resistant system enabling cable television subscribers to receive upon request certain programs otherwise unavailable (i.e., "secure") while precluding such reception by non-requesting subscribers as well as non-subscribers. Before transmission of... | 05/19/1981 |
| 4250524 | Validation apparatus in a pay television system A validation apparatus in a pay television system, including a code detector means for successively detecting a sequence of code signals, from an encoded composite TV signal, a key code circuit means having a key code so as to validate the sequence of cod... | 02/10/1981 |
| 4161751 | High-security cable television access system A poach-resistant system enabling cable television subscribers to receive upon request certain programs otherwise unavailable (i.e., "secure") while precluding such reception by non-requesting subscribers as well as non-subscribers. Before transmission of... | 07/17/1979 |
| 4118669 | Remote disconnect-reconnect tap for cable television systems A remotely controlled disconnect-reconnect tap for a cable television system having a head end feeding a cable distribution system. The tap comprises means for receiving and detecting a plurality of pairs of tones modulated on a carrier and sent over the ... | 10/03/1978 |
| 3936594 | Secure television system A secure system for television transmission wherein a television signal is transmitted on one frequency channel and a composite high fidelity stereophonic audio signal is transmitted on a separate unrelated frequency channel. Unauthorized reception of the... | 02/03/1976 |
