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7224992 |
Four pole stereo headset with push to talk capability in a duplex radio
A stereo headset ( 104 ) with push-to-talk function can be interfaced with a wireless communication device ( 102 ) via a connector interface. The connector interface preferably includes a jack at...
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6925315 |
Telephone handset with thumb-operated tactile keypad
An improved cell phone arrangement has a centrally located orientation key, for referencing a location tactilely via the user's thumb, and the dialing keys arranged in a substantially circular...
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6880761 |
Method for loading data onto chip cards and devices adapted thereto
A method for loading data on chip cards ( 2 ) wherein data from a service center ( 6 ) are transmitted over a mobile network ( 4 ) to a SIM card ( 1 ), which is inserted in a mobile device ( 3 )...
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6477502 |
Method and apparatus for using non-symmetric speech coders to produce non-symmetric links in a wireless communication system
A method and apparatus for balancing the forward link capacity of a wireless communication system with the reverse link capacity of the system is presented. Speech coders with selectable modes are...
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6223018 |
Intra-body information transfer device
An information transfer device which transfers a signal via a human body, comprising: a transmitter having a signal source for outputting a time varying signal, a modulator for modulating a signal...
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6154635 |
Antenna driving device for transponder
An antenna coil (21) for generating a magnetic field (25) to supply power to a transponder (26) is energized through switching devices (23 and 24) connected between Vcc and GND of a D.C. power...
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6091779 |
Process for the wireless transmitting of energy and data
In the case of a process for the wireless transmission of energy and data between two parts, preferably the steering wheel and the steering column of a vehicle, having a transformer-type...
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6031492 |
Mobile cradle antenna and heat sink enhancement
A cradle unit for use in transmitting radiocommunication signals from within a vehicle between a portable phone unit inside a vehicle and an external antenna connected to an exterior of the vehicle...
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5995591 |
Connecting arrangement for reducing induced noise
A fixed wireless access subscriber unit extension telephone cable connecting arrangement is disclosed. The cable itself includes a single pair of wires for carrying the tip and ring signals between...
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5949291 |
Cordless telephone with digital frequency adjustment
A digitally-controlled frequency synthesizer circuit is provided. The synthesizer circuit has a synthesizer that provides as an output a signal that is based on a reference frequency supplied from...
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5940447 |
Wireless powered communication device using power signal sampling and method
A circuit (34) for data recovery in a wireless powered communication device (10) obviates the need for the costly high power consumption filters of prior art devices by deriving a clock signal from...
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5809429 |
Radiating coaxial cable and radio communication system using same
A radiating coaxial cable comprises an inner conductor, a layer of cellular foam dielectric material surrounding the inner conductor, and a single, continuous, corrugated outer conductor...
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5625883 |
System for wireless information transmission between two different rooms
For audio and/or video or control signal transmission between two rooms in, for example, a house, inductive and/or capacitive transmitters and receivers are used which are installed on opposite...
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5329576 |
Wireless communication zone management system
A wireless communication system comprising a plurality of antennae, the antennae being arranged in a grid pattern over a communication region, wireless portable terminals located within the...
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5293400 |
Contactless linking device for interconnecting data bus sections
The device serves to interconnect first and second sections of a data bus in order to provide a transparent bi-directional data transmission along the bus comprised of the two sections,...
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5257290 |
Transmission line termination of guide-communications wire for guided vehicles
A system for digital communication over a wire lain along the path of guided vehicles to a modem and a loop driver, the modem providing high frequency signals and the loop driver providing low...
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5247575 |
Information distribution system
An information distribution system provides information to a user, when the information corresponds to criteria individually selected by the user, and then charges the user only for the selected...
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5230085 |
Method and apparatus for wireless electromagnetic communication within a contained electromagnetic field
Wireless electromagnetic communication between a primary transceiver and one or more secondary transceivers located within an enclosed structure may be effectuated by forming a multi-conductor...
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5115463 |
Extended cordless telephone system
An extended cordless telephone system for communicating information signals from a plurality of telephone lines through a telephone exchange, including a central station and a plurality of remote...
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4993060 |
Portable device for use by a news reporter
A portable device to be carried by a reporter and coupled to a telephone line to a location from which the reporter wishes to transmit a report to a broadcast station to be broadcast live has a...
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4918745 |
Multi-channel cochlear implant system
A method and system is described for electrically stimulating the auditory nerve with multiple channels of audio information. Audio information is transmitted from an external microphone to a...
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4908869 |
Induction-based assistive listening system
A multiple-loop magnetic induction system for improving communication with the hearing-impaired or to people in general who wish to listen privately to speech or music while being in the company of...
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4866732 |
Wireless telephone system
A wireless telephone communication system for wireless, voice, data or voice and data terminals comprising apparatus at a central location for receiving one or a plurality of signals for...
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4792965 |
Oscillator system for detecting a selected one of a plurality of tuned circuits
The system of the present invention allows transmission of information and data across a gap, for example, from the steering wheel of an automobile to the steering column, without any physical...
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4747158 |
Cordless communications system
A cordless communications system wherein transmission is made and received via magnetic lines of induction comprises a base station and at least one mobile station wherein the base station receives...
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4736452 |
Core coupled transmitter/receiver loops for connectorless entertainment systems
A method and apparatus for interconnecting passenger entertainment service units to the aircraft system through connectorless inductive couplers. Couplers are arranged along the seat track as...
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4697283 |
Telephone handset with integrated flux coil
A telephone handset having a receiver housing at one end has a flux coil positioned at the front corner at the junction between the peripheral wall and the front wall of the housing. The flux coil...
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4694292 |
Digitized decoder-receiver for receiving call signal
A novel method for receiving a numerical call signal which comprises assigning a certain call number to a specified person; transmitting an electromagnetic wave carrying the call number as the...
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4602255 |
Luggage door unlocking device for vehicle
A luggage door unlocking device for a vehicle, capable of unlocking the luggage door of the vehicle without using an unlocking key includes a portable signal transmitter for transmitting an...
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4584707 |
Cordless communications system
A cordless communications system wherein transmission is made and received via magnetic lines of induction comprises a base station and at least one mobile station wherein the base station receives...
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4528677 |
Data transmission system
A data transmission system including a pair of parallel transmission lines, applies data signals to the transmission lines through a transformer and an associated impedance connected across the...
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4462113 |
Cordless transmitting and receiving apparatus
A cordless transmitting and receiving apparatus which is capable of providing transmitting and receiving between a key transmitting and receiving apparatus such as a telephone and a portable remote...
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4352200 |
Wireless aircraft passenger audio entertainment system
Audio information in several audio channels is supplied via head sets to passengers seated aboard an aircraft in rows of seats including armrests and being distributed along an elongate passenger...
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4301335 |
Visual telephone or other annuciator ringing indicator
A ribbon of light with a bright spot moving thereacross is generated by a series of sequentially located indicator lamps or LED's, sequentially energized by a ring counter which, in turn, is...
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4117271 |
Inductive communication system
An apparatus providing multiple conversations over limited range. Pseudo-se modulations and specific address coding permit multiple conversations between a base station and several vehicles or...
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4101835 |
Method and electronic control device for radio telephone communication
An electronic control device interfaces a duplexed frequency radio communications system with an ordinary telephone set to enable two-way communication between mobile two-way radios and land line...
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3967201 |
Wireless subterranean signaling method
A relatively low frequency wireless electromagnetic communication link is established through a subterranean lossy medium such as ground or water by launching and propagating magnetic waves of...
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3872252 |
Apparatus for monitoring electrical signals, either artificial and/or natural in a living body, via a communication link
A monitor apparatus for simultaneously monitoring via a telephone communication link electrocardiographic signals of a patient produced as a result of the heart function of the patient, and...
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3803366 |
DUPLEX COMMUNICATION SYSTEM USING PLURALITY OF HAND SETS
A duplex communication system including a fixed station and a plurality of hand sets. The transmitter of the fixed station is coupled to a propagating conductive pair line for propagating, by an...
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3700886 |
COMMUNICATION SYSTEMS BETWEEN A TRACKWAY AND VEHICLES
A communication system is provided between a trackway and a vehicle running along the trackway, in which information is transmitted between the trackway and the vehicle through an energy coupling...
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3660760 |
INDUCTIVE COMMUNICATION SYSTEM
There is disclosed a communication system in which a pair of spaced conductor rods or elements, embedded or placed in the earth, and energized by a signal voltage to induce a dynamic magnetic...
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3659056 |
HEARING AID SYSTEMS
This invention relates to a hearing aid system for the education of deaf children, and permits the incorporation of such children in a class of normal children. The child carries a conventional...
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3636508 |
SYSTEMS FOR TRANSMITTING INFORMATION BETWEEN A RAILWAY TRACK AND MOVING TRAIN
A system for transmitting information between a trackway and a moving vehicle and of the kind in which one or more coils laid on the trackway become inductively coupled with aerial means on the...
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3617890 |
INDUCTION RADIO SYSTEM FOR VEHICLES
An induction-radio system with a low induced noise level and unwanted radiation level for transmission of communication and control signals between a vehicle following a track and wayside station....
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3543262 |
SIGNAL DISTRIBUTION CIRCUIT HAVING INDUCTIVE ATTENUATION MEANS
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3534303 |
SURFACE WAVE TRANSMISSION
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3495213 |
DUAL SIGNAL GUIDANCE SYSTEM FOR THE BLIND
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3427614 |
WIRELESS AND RADIOLESS (NONRADIANT) TELEMETRY SYSTEM FOR MONITORING CONDITIONS
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3423757 |
ELECTRICAL SIGNAL RADIATING APPARATUS
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3396245 |
Mode of signal responsive hearing aid apparatus
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