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| Number | Title | Issue Date |
| 7864928 | Infrared communication receiver In order to adjust and decrease an acoustic pressure of a speaker driven based on an audio signal, an infrared communication receiver includes: a receiving section for receiving via infrared communication an audio signal representing audio data; and a speaker drivin... | 01/04/2011 |
| 7421203 | Method for transmitting packet in wireless access network based on wavelength identification code scheme A method for transmitting a packet in a wireless access network based on a wavelength identification code scheme. The method comprises the steps of connecting n number of RNCs (Radio Network Controllers) to one sub-ring where the “n” is a positive integer, and a... | 09/02/2008 |
| 7409159 | Wireless wavelength division multiplexed system A system and method for linking optical wavelength division multiplexed (OWDM) networks by using wireless communications. Each optical channel in a OWDM network is coupled to a wireless wavelength division multiplexing (WWDM) channel by a WWDM transceiver, which tra... | 08/05/2008 |
| 7260375 | Frequency agile RF circuit A frequency agile sequential amplifier circuit that includes first and second RF amplifiers coupled by a SAW delay line, a double balanced mixer coupling the first RF amplifier to the SAW delay line, the output of the first RF amplifier providing a signal as a first... | 08/21/2007 |
| 7243233 | System and method for secure communication between electronic devices A system of securing communications, comprising a plurality of computer peripheral resources, a beacon in signal communication with and located proximate each computer peripheral resource and configured to communicate using RF signals and ultrasound signals, and a p... | 07/10/2007 |
| 7110553 | Directional microphone assembly for mounting behind a surface A directional microphone assembly suitable for subsurface mounting. A directional pickup pattern is developed from the outputs of a plurality of omnidirectional microphone elements mounted in an assembly behind a surface such that their acoustic excitation comes fro... | 09/19/2006 |
| 7076272 | Pen-shaped cellular phone A keyboard section 9, whose operation keys are allocated linearly in a longitudinal direction on the cylinder chassis 1, is established except for at the location of the grip section 1a, which is held by the user when the cylinder chassis... | 07/11/2006 |
| 7069577 | Dynamic bandwidth allocation The communication system includes a hybride fiber/coax distribution network. A head end provides for downstream transmission of telephony and control data in a first frequency bandwidth over the hybrid fiber/coax distribution network and reception of upstream teleph... | 06/27/2006 |
| 7026808 | Method and apparatus for providing information from a speed and direction sensor A method and apparatus for providing information from a speed and direction sensor is disclosed. The method and apparatus detect the presence of a ferromagnetic object as it moves past a sensor. The sensor determines speed and direction information regarding the fer... | 04/11/2006 |
| 7010098 | Ultrasonic proximity detector for a telephone device An ultrasonic proximity detector for a telephone device to detect the proximity of an object thereto includes an ultrasound signal generator generating ultrasound that is broadcast by a speaker of the telephone device. Processing circuitry is coupled to a microphone... | 03/07/2006 |
| 7003790 | Broadcast-program selection history information acquisition apparatus and its method In a broadcast-program selection history information acquisition apparatus and its method, the totalization side can easily totalize selection history information. To acquire the selection history information of a broadcast program selected out of broadcast programs... | 02/21/2006 |
| 7003321 | Mobile communication system and switching apparatus When a signal is sent from a wireless base station 3-1, a wireless modem 10-1 converts the signal to a signal of a unified transmission form. The switch 11-1 switches the signal to one of wireless transceivers 12-1... | 02/21/2006 |
| 6999112 | System and method for communicating content information to an image capture device A content information manager communicates content information to a digital image capture device. One embodiment comprises a means for storing the content information in a memory, a means for communicating the content information to a digital image capture device, a... | 02/14/2006 |
| 6950681 | Transmission of data by ultrasound An ultrasonic transmission system in which, for the purpose of transmission, a signal is used which generates a broadband signal by means of code spreading and is capable of eliminating any echoes by means of correlation. The transmission system exhibits a transmitt... | 09/27/2005 |
| 6889032 | Mobile base station for disseminating information A device for implementing a multimedia communication dissemination system is disclosed herein. The communication system integrates heterogeneous satellite transmission systems, local area computer networks, and the public telephone system to implement a flexible, hi... | 05/03/2005 |
| 6782199 | Optical communications systems with optical subsystem communications links Optical communications networks are provided that allow network maintainers to monitor or control subsystems using communications links other than optical telemetry links. The communications links may be wireless links or may be based on any other suitable communica... | 08/24/2004 |
| 6754483 | Method and system for generating a secure wireless link between a handset and base station Methods and apparatus for establishing secure wireless links between a handset and a base station in cordless telephone systems are described. A method of generating a secure wireless link between a handset and a base station includes initiating a linking procedure,... | 06/22/2004 |
| 6704568 | Protection system for an electricity network having an infrared data transmission link using the WAP protocol The digital protection system for a high voltage electricity network to instruct circuit breakers to open in the event of faults being detected by current and/or voltage sensors on the network lines 4 connected to the circuit breakers. The digital protect... | 03/09/2004 |
| 6507734 | Method and system which uses sound wave based communication to generate a secure wireless link between a handset and base station Methods and apparatus for establishing secure wireless links between a handset and a base station in cordless telephone systems are described. A method of generating a secure wireless link between a handset and a base station includes initiating a linking... | 01/14/2003 |
| 6363139 | Omnidirectional ultrasonic communication system An ultrasonic communication system includes an omnidirectional ultrasonic transducer including a housing having a closed side and an open side defining an aperture in the housing. A diaphragm is mounted into the housing to form a sealed cavity between the... | 03/26/2002 |
| 6310705 | Duplex outdoor base station transceiver subsystem utilizing a hybrid system of a high power amplifier and an optic antenna The invention relates to a duplex outdoor base station utilizing a hybrid system of a high amplifier and optic antenna to communicate over both radio and optic frequencies. The base station includes: a RF front end part interfaced with an optic antenna; a... | 10/30/2001 |
| 6094146 | Method of, and communication system for, sending messages A method of transmitting messages in a communication system including a primary station and at least one secondary station, the secondary station being identifiable by an address code word, the primary station transmitting messages signals in the format o... | 07/25/2000 |
| 5977880 | Data communication system and data communication terminal applied thereto A communication system is designed to exchange messages between a plurality of paging receivers each having a transmission section. One of the paging receivers transmits a question message and a plurality of answer contents to the question message to a pa... | 11/02/1999 |
| 5966643 | Hand-held radiotelephone having two-part construction Known hand-held mobile radiotelephones and cordless telephones have the dimensions of a handset, and their antennas radiate near the user's head; such may be improved by providing a hand-held radiotelephone which is of a compact design and fully user-cont... | 10/12/1999 |
| 5946394 | Isolation amplifier with hook switch control An isolation amplifier circuit with hook switch control includes first and second amplifier stages optically isolated from and coupled to each other. A biasing circuit is optically coupled to the amplifier to provide a switchable prebias to the amplifier ... | 08/31/1999 |
| 5936547 | System and method for providing user-selected information to a paging-capable device A system and method for providing user-selected information to a paging-capable device. An enhanced paging system responsive to information sources and a selection device transmits information to a paging-capable device. Such a system can provide user-sel... | 08/10/1999 |
| 5915207 | Mobile and wireless information dissemination architecture and protocols A device for implementing a multimedia communication dissemination system is disclosed herein. The communication system integrates heterogeneous satellite transmission systems, local area computer networks, and the public telephone system to implement a f... | 06/22/1999 |
| 5870030 | Advertiser pays information and messaging system and apparatus A system and apparatus for permitting a user of a selective call receiver (31) to receive a certain number of personal messages and information service updates without paying a fee for such services in return for reading advertisements wirelessly transmit... | 02/09/1999 |
| 5828311 | Circuitry and method for accessing a radio pager Remote access circuitry and an associated method for a pager permits remote access to a pager from a source other than a network paging terminal. Human-perceptible signals are provided to the remote access circuitry by way of a mass-market communication m... | 10/27/1998 |
| 5815298 | System and method for wirelessly communicating a sound signal A system for communicating a signal representing the amplitude of a sound signal received at a remotely located transceiver via an optical airlink communication network, the system having an optical transceiver, including an optical receiver and an optica... | 09/29/1998 |
| 5790291 | Beam steering and tracking of laser communication links by dual-quadrant tracker and photodiode assembly At the reception site of a laser transmission system the received laser light beam is converted into a focusing cone of light. The cone of light is directed to partially illuminate the inner area of the quad photo detector array which is used to provide a... | 08/04/1998 |
| 5774856 | User-Customized, low bit-rate speech vocoding method and communication unit for use therewith A voice encoding method and apparatus initialize! initializes (160) transmit and receive vocoders operated within communication units (12, 42) with a user-unique speech characteristic model (SCM) table (320) and an input stimulus table (340). The SCM ta... | 06/30/1998 |
| 5757277 | Wireless selective call receiver and method and system for writing desired data in the same In writing of a communication data from a data transfer apparatus into a wireless selective call receiver, an appropriate transmission rate is first determined through communicating between a wireless selective call receiver and a data transfer apparatus ... | 05/26/1998 |
| 5668852 | Automatic caller-associated information provision system, improvement and method for paging system Caller-associated information (CAI) may include various data such as names, addresses, telephone numbers, demographic information, messages, other like information and, most preferably, the caller's telephone number. The system includes telephone line-con... | 09/16/1997 |
| 5636264 | Radio telephone system which utilizes an infrared signal communication link A radio telephone system comprising a transceiver unit and an external device, such as a handset, computer or telecopier, in wireless infrared signal communication with the transceiver unit. The information transmitted between the transceiver unit and the... | 06/03/1997 |
| 5598287 | Multiple access telecommunication network In a multiple access network the signals transmitted by a plurality of sub-stations to a main station over a common channel must be distinguished for each sub-station. A method of achieving this is to employ SCMA (Subcarrier Multiple Access), according to... | 01/28/1997 |
| 5463671 | Telecommunications network having a distributed network of decentralized local stations A method of establishing a telecommunications network. The method includes the steps of providing a network of local stations joined to one another by microwave links, and arranging, in a cluster around each local station, a plurality of subscriber, or te... | 10/31/1995 |
| 5410587 | Ultrasonic radiotelephone for an automobile A car radiotelephone system having one or more wireless handsets communicating voice and control information via an ultrasonic link with a stationary unit connected functionally to a base station. The base unit (1) is connected by two cables, an audio-out... | 04/25/1995 |
| 5315645 | Communication apparatus utilizing digital optical signals Communication apparatus using baseband, digitally formatted optical signals provides an infrared optical communication link between a terminal unit and station unit. Pulse width modulation or continuously variable slope delta modulation digital procotols ... | 05/24/1994 |
| 5251053 | Radio communication system In a cellular mobile-radio system with radio stations and transmission facilities remote therefrom, the radio stations send out radio signals and receive radio signals which, in each case, contain information signals. According to the invention, as many a... | 10/05/1993 |
