Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7873980 | High-speed cable with embedded signal format conversion and power control A High Definition Multimedia Interface (HDMI) cable carries high speed encoded data which are transmitted differentially over data channels, along with a clock. A Mobile High-Definition Link (MHL) cable carries high speed data which are multiplexed to achieve smalle... | 01/18/2011 |
| 7310807 | System and method for local video distribution A system and method are disclosed for facilitating local video distribution. A method incorporating teachings of the present disclosure may include linking a plurality of users with associated carrier frequencies. The associated frequencies may be given approximatel... | 12/18/2007 |
| 7221550 | Surge protection device and method A device and method are disclosed for protecting a wireless communication system from impulse surges occurring in the system under the impact of lightning discharges. The device includes a high frequency line, and a first decoupling filter formed as a λ/4 section a... | 05/22/2007 |
| 7149223 | Enhanced fiber nodes with CMTS capability Enhanced Cable Modem Termination System (CMTS) functionality, including programmable digital domain modulators and demodulators for dynamic channel assignment, is incorporated into Fiber Nodes (FNs) or mini Fiber Nodes (mFNs), yielding enhanced Fiber Nodes (eFNs). T... | 12/12/2006 |
| 7099340 | Enhanced CMTS for reliability, availability, and serviceability A Cable Modem Termination System (CMTS) is partitioned into Line Cards, I/O Cards, and a midplane to provide enhanced Reliability, Availability, and Serviceability. Each I/O Card provides a cabling interface for coupling an assigned Line Card to other portions of a ... | 08/29/2006 |
| 7093276 | CATV trunk amplifier, upward signal amplifier, and bi-directional CATV system In a CATV trunk amplifier, a downward signal input to an input terminal from the center equipment side is input to a downward amplifying circuit via a first filter and a second filter. The amplified downward signal is output to the terminal device side via the secon... | 08/15/2006 |
| 7068682 | Signal distribution within customer premises Data signals from a telecommunication network are routed to a gateway which generates analog signal distributed to receivers within a customer premises. A network interface device receives digital signals from the telecommunication network. A first diplexer has a di... | 06/27/2006 |
| 7047555 | In-building CATV system, down-converter, up-converter and amplifier In order to correctly perform frequency conversion without using a pilot signal from an external system in a CATV system in which an upward signal is converted to a high frequency in-building upward signal using an up-converter and the in-building upward signal is c... | 05/16/2006 |
| 7039941 | Low distortion passthrough circuit arrangement for cable television set top converter terminals In a cable television converter terminal, NICAM signal passthrough is achieved using an alignment-free passthrough circuit including a NICAM SAW filter. The alignment-free passthrough circuit directly taps the output of the converter terminal's tuner to obtain the N... | 05/02/2006 |
| 7012941 | Laser module A laser module for transmitting/receiving digital signals using a laser diode as an optical source is disclosed. The input end of the laser module is provided with a low pass filter, such that the low pass filter makes a 3 dB bandwidth of frequency response transfer... | 03/14/2006 |
| 7012923 | Method for allocating a bandwidth between network terminals in a communication network and network including a medium access controller for performing such a method A method for allocating a bandwidth between a plurality of network terminals (NTx) coupled, via a common link (L), to a main network station (LT) in a communication network. A medium access controller (MC) forwards permits to the network terminals,... | 03/14/2006 |
| 7007296 | Active cable modem outside customer premises servicing multiple customer premises A signal distribution system to save on the cost of cable modems for cable TV headend operators who wish to deliver broadband digital data services, DSL, video-on-demand or POTS service over their HFC CATV delivery networks. All species within the genus have a share... | 02/28/2006 |
| 6848116 | Method and apparatus for on-demand video program access control using integrated out-of-band signaling for channel selection An on-demand program access system for broadband, frequency division multiplexed cable television signals, one or more infrastructure element (IF) constituting a local video network signal server has a plurality of subscriber premise equipment elements (SPEE) served... | 01/25/2005 |
| 6836898 | Subscriber power module for CATV customer interface equipment A CATV system has a multitude of customer interfaces which include an external unit and an internal unit. The units includes equipment for signal conditioning, cable to telephone interface, and/or cable to computer interface. The internal unit is provided with power... | 12/28/2004 |
| 6804828 | Tap device of cable broadcasting system A part of transmission signal is branched by a directional coupler, and split by a splitting circuit, so that the transmission signal can be outputted to the subscribers' terminal devices via branched output terminals. Latching relays disposed in signal paths to the... | 10/12/2004 |
| 6785907 | Amplifier and equalizer for two way cable transmission A feed signal equalizer for a feed amplifier for two-way coaxial cable systems, of the type having a distribution centre distributing feed signals, and having reception facilities for receiving return signals from said cable system, the system having feed amplifiers... | 08/31/2004 |
| 6769133 | Termination circuitry for dual forward and reverse test points for amplifiers A communication system (100) processes forward signals generated by headend equipment (105) and reverse signals generated by subscriber equipment (135). A communication medium (110, 120), such as fiber optic cable or coaxial cable, connec... | 07/27/2004 |
| 6751803 | Signal distribution circuit Received digital CATV signals are branched by a directional coupler into signals flowing in a through direction and signals flowing in a branch direction. The signals output from the directional coupler in the through direction are then fed through an extraction cir... | 06/15/2004 |
| 6737935 | Diplex circuit forming bandstop filter A bandstop filter for use in CATV applications is formed by a pair of diplexers, a lowpass filter and a highpass filter. Signals having a frequency range of, e.g., 0-3 GHz enter at a first node connected to the inputs of both the lowpass and highpass filters. Signal... | 05/18/2004 |
| 6725462 | Optimizing upstream transmission in a cable television distribution plant A method and apparatus for reducing delay distortion of upstream transmissions in a cable television (CATV) distribution plant. Upstream transmission in a CATV distribution plant, i.e., from the customer premises toward the head-end, is made difficult by delay disto... | 04/20/2004 |
| 6718553 | Centralized aggregation of broadcast television programming and multi-market digital delivery thereof over interconnected terrestrial fiber optic networks Systems and end-to-end methods for delivering digital aggregated broadcast television programming from a centralized aggregation headend to subscribers in multiple markets using an interconnected terrestrial fiber optic network. A centralized aggregation headend rec... | 04/06/2004 |
| 6600900 | System and method providing bi-directional communication services between a service provider and a plurality of subscribers A telecommunications system for bi-directional communication services between a service provider and a plurality of subscribers wherein return signals associated with the bi-directional communication services utilize a first frequency band. The system inc... | 07/29/2003 |
| 6581208 | Up-converter and down-converter for in-building CATV system An in-building CATV system having a down-converter for converting the in-building upward signal to the signal for a bi-directional CATV system provided with a high-pass filter disposed between an internal terminal and a converter for eliminating input of ... | 06/17/2003 |
| 6560778 | Tap device of cable broadcasting system There is disclosed a tap device for branching a part of transmission signals running through a transmission line to selectively transmit branched signals to subscriber terminal devices via tap output terminals, in which signal paths for leading the transm... | 05/06/2003 |
| 6550063 | Network interface module for receiving cable television broadcasting An HPF for blocking an upstream signal and passing a downstream signal, an LPF for blocking the downstream signal and passing only an upstream data signal, a directional coupler for branching, and a high frequency relay for forming a through line are buil... | 04/15/2003 |
| 6449071 | Digital signal processing optical transmitter A node (200) for receiving analog signals transmitted within a broadband communication system (100) includes a summer (205) for summing the analog signals to generate a summed analog signal and an analog-to-digital (A/D) converter (210) coupled to the sum... | 09/10/2002 |
| 6418149 | Bi-directional premises wiring system and method The present invention provides a system and method for using existing wiring or cabling in a residence or other customer premises both (a) to transmit network telecommunications to a gateway or similar device for processing, and (b) to distribute processe... | 07/09/2002 |
| 6418558 | Hybrid fiber/coax video and telephony communication A video and telephony signal distribution network is provided. The network includes a head end for transmitting to a plurality of remote units. The network further includes at least one optical/electrical converter unit that transmits to the remote units ... | 07/09/2002 |
| 6393607 | AC port device for cable television tap A cable television tap (500) for receiving a forward signal including an information signal and a power signal. The tap (500) includes a diplex filter (520) for receiving the forward signal and for separating the information signal from the power signal a... | 05/21/2002 |
| 6198498 | Dual forward and reverse test points for amplifiers A communication system (100) processes forward signals generated by headend equipment (105) and reverse signals generated by subscriber equipment (135). A communication medium (110, 120), such as fiber optic cable or coaxial cable, couples the headend equ... | 03/06/2001 |
| 6169586 | Method and apparatus for programming a television receiver The method according to the invention is distinguished by the fact that a transmitter identifier (SK) is contained in the received channel (EK), the program locations (P) are assigned once to the received channels (EK), and in the event of a deviation fro... | 01/02/2001 |
| 6169569 | Cable modem tuner A cable modem is configured to include a tuner having a front end which includes a duplex filter stage and a decoupler stage and a rear end which includes a single conversion tuner. The duplex filter stage couples the tuner to a network, a computer system... | 01/02/2001 |
| 6166730 | System for interactively distributing information services In an interactive information distribution system that utilizes open sessions to provide requested information to users, a method for sharing the use of open sessions between a plurality of set top terminals associated with a common account number or user... | 12/26/2000 |
| 6160571 | Compact cable tuner/transceiver A CATV transceiver is provided within an RF shield enclosure. The transceiver circuit includes a diplexer, having fixed value inductors, that is coupleable to a CATV cable plant to receive an RF input signal and to transmit an RF output signal. The RF rec... | 12/12/2000 |
| 6160989 | Network controller for cable television delivery systems A novel network controller for use with a digital cable headend capable of monitoring and controlling set top terminals in a television program delivery system is described. The invention relates to methods and apparatus for a network controller that mana... | 12/12/2000 |
| 6151480 | System and method for distributing RF signals over power lines within a substantially closed environment A system for distributing RF signals to users over power lines in a structure. The system includes a head end unit that receives RF signals in a first frequency range to be distributed to users in the structure. The head end unit is coupled to the power l... | 11/21/2000 |
| 5826167 | Bi-directional cable television system including a UHF filter A cable television system employs two-way communication between a headend and at least one subscriber terminal. The two-way communication is provided by having separate frequency bands for each communication path. The frequency bands do not overlap and th... | 10/20/1998 |
| 5815794 | Undesirable energy suppression system in the return path of a bidirectional cable network having dynamically allocated time slots A bidirectional cable network having a signal distribution system that prevents undesirable energy in the bidirectional cable network's return path from adversely effecting the entire network. The signal distribution system a first signal transmitted in a... | 09/29/1998 |
| 5768682 | Shared hybrid-fiber coax transmission system having improved bandwidth in the stream channel with ingress noise reduction Bandwidth is increased and noise may be reduced in a shared hybrid fiber-coax transmission system (10) by digitally modulating upstream information onto a high frequency band (e.g., 750-1000 MHz) and thereafter digitally regenerating the high frequency up... | 06/16/1998 |
| 5745838 | Return path filter A filter for controlling the return path loss in a multi-channel communication system having forward and return paths. The filter comprises a forward path filter network, and a return path filter network. The forward path network passes signals in the for... | 04/28/1998 |
