Matches 451 - 500 out of 529 < 1 2 3 4 5 6 7 8 9 10 11 >
Match Document Document Title
5590414 Adapter unit for a portable radio telephone enabling either one of data transmission and hand-free operation  
An adapter unit for a portable radio telephone is disclosed. The adapter unit is selectively used for either one of the data transmission and the hand-free operation in response to a control signal...
5586182 Portable telephone set  
For a portable telephone set having a display portion for displaying various information associated with call or origination and reception, a gyro for detecting inclination of a main body is...
5584056 Dual-bandwidth cellular telephone switching apparatus  
A dual-bandwidth cellular telephone switching apparatus comprising a signal receiver, the signal receiver including an antenna for receiving radio frequency signals on a field corresponding to...
5578875 Dual battery recharger with backup power feature for use in systems having a base unit and battery-powered portable unit  
An alternative power supply apparatus for use in association with systems having a base unit connected to an external power supply and an associated battery-powered portable unit. The alternative...
5553138 Telephone line sourced power supply  
In a telecommunication unit attached to a telephone line, power is provided by taking power from the telephone line when the unit is off-hook. When the unit remains on-hook, power is maintained to...
5553125 Telephone apparatus with calling line identification  
A portable cellular telephone capable of recognizing a Calling Line Identification (CLI) signal. The telephone comprises a memory in which can be stored telephone numbers together with an...
5551065 Wireless solar entertainment system  
This invention comprises a consumer electronics entertainment system with a transmitter and a wireless headphone receiver with matching frequency reception. It is particularly adapted for use by...
5551077 Portable telephone equipment with condition restoration  
After recovery from a power failure in a main power source, if it is a short break, recovery time is obtained from a built-in clock and the period of the short break is calculated from this...
5548824 Portable radio communication device housing having a battery storage unit  
A slim portable radio communication device housing that can be connected to an external input/output connector without removing a battery pack. A fitting mount of a battery pack is rotatably fitted...
5548823 Portable telephone having a receiver section capable of receiving power from multiple external power sources  
A portable telephone including a synthesized local oscillator using a voltage controlled oscillator in the receiver section and receiving its operation power from either built-in battery or an...
5533101 Extension phone type cordless telephone set  
An extension phone type cordless telephone comprises a terminating set, a plurality of branch sets, and a plurality of charger stands. The terminating set comprises a terminating set radio...
5519757 Wireless telephone set  
A wireless telephone set comprise control circuit for controlling the transmission and the reception of signals, and a power switch for controlling the supply of a power to the control circuit. The...
5493703 Portable radio device with on-vehicle adaptor system  
A portable radio device includes a radio device main body, a man-machine interface unit, a first interface unit, a fixing adaptor, and a cord. The radio device main body has a radio unit for...
5490202 Attachable and detachable additional device for use with a portable telephone for electrically connecting with the portable telephone external equipment  
An additional device for a portable telephone electrically connects a battery pack to a portable telephone main body. The additional device has first connecting means for detachably connecting the...
5487099 Portable telephone having an additional device for making external connections  
The present invention relates to a portable telephone, and an object of the present invention is to provide a portable telephone and an additional device for the portable telephone capable of...
5483574 Communication terminal equipment  
A telephone set includes an audio system circuit and a data system circuit connected to a data terminal equipment having a data communication function in and an oral communication function. The...
5465401 Communication system and methods for enhanced information transfer  
A communication system (20) is provided with multiple purpose personal communication devices (50 and 150). Each communication device (50 and 150) includes a touch-sensitive visual display (60 and...
5461664 Emergency wireless telephone  
A portable telephone, which is used for emergency purposes. It is powered by a battery, which has a short life counterbalanced by higher power, thus improving efficiency and effectiveness of the...
5457376 Integrated battery contact and retentive protrusion  
A battery (10) includes at least one cell (71) which is contained in a housing (16). Mating mechanisms, located on the housing, selectively attach the battery to the radio. The mating mechanisms...
5446783 Cellular phone with infrared battery pack  
A cellular phone has, in addition to an antenna, speaker and microphone, a device interface capable of transmitting electronic information between the cellular phone and an electronic device, such...
5444306 Mobile radio telephone apparatus  
The radio telephone apparatus which is mounted on a car is disclosed. An operational state of the apparatus is memorized therein as a power flag. On the basis of the power flag, the apparatus may...
5438695 Radio-link continuity keeping equipment in cellular telephone mobile station  
A radio-link continuity keeping equipment in a cellular telephone mobile station includes a removable battery, a backup memory for storing therein a channel connection information when the battery...
5438612 Radio telephone apparatus having call limiting function  
A radio telephone apparatus having a time specifying unit, a time measuring unit, a call controller, and an auxiliary power supply. The time measuring unit measures an elapsed period of time to...
5426690 Cordless telephone apparatus which restores radio channels after power loss  
A cordless telephone apparatus detects the received field strength in a receive channel, as viewed from the base unit side, and if the field strength is below a prescribed level outputs an...
5423078 Dual mode power amplifier for analog and digital cellular telephones  
The present invention relates generally to RF power amplifiers for portable cellular radiotelephones, and more particularly, to dual-mode cellular radiotelephones. A power supply network enables...
5404578 Radio telephone in which an off operation of an operator-actuated power switch is inhibited during a talk mode  
A radio telephone apparatus, such as a car telephone, and the method of controlling a radio telephone apparatus, in which the OFF operation of a power source switch caused by an erroneous operation...
5400388 Circuit and method for operating a radio telephone upon loss of AC power  
A circuit for preventing a radio telephone engaged in a call from being cut off when a power failure occurs, wherein the radio telephone is branched with a wire telephone by a telephone line. When...
5365570 Emergency cellular telephone apparatus  
Emergency radio telephone apparatus includes a housing, a radio transceiver for receiving and transmitting modulated radio signals, an actuator connected to the housing for actuating the...
5363030 Battery having a transistor switch for supplying energy  
Supply of energy to a radio device (220) as provided by a battery pack (210) is remotely controlled by coupling a transistor switch (213) between an energy source (212) within the battery pack...
5349697 Radiotelephone including battery-backup random access memory for storing operating code  
The program code of an object program of a radiotelephone is recorded into a RAM (3) rather than in an EPROM as is conventional. The checking of the program code and the loading of the program from...
5335263 Power supply switching circuit for a compact portable telephone set  
In order to reduce volume and weight of a power supply of a compact portable telephone set and thus reduce volume and weight of the compact portable telephone set itself, a P-channel power MOSFET...
5333176 Cellular hand held portable speakerphone system having an interface adapter  
A hand held cellular telephone system including voice storage features which enable the cellular telephone to perform functions similar to a telephone answering device, a battery monitoring system...
5327583 Using a clock signal generated by a microcomputer for providing a negative bias voltage to a galium arsenide field effect transistor in a high frequency amplifier of the device  
In a mobile radio communication device, a gain of a GaAs FET for high frequency power amplification is controlled by a negative voltage based on a clock signal generated by a microcomputer in the...
5303395 Power control with a constant gain amplifier for portable radio transceivers  
A system for controlling the power level of RF signals output by a portable radio transmitter having a first voltage supply, a first amplifier stage and a microcomputer coupled to the first...
5287554 Portable radio communication equipment  
In a portable radio equipment, a first power unit (11) and a second power unit (15) can be selectively mounted to or removed from a radio equipment main unit (1). The main unit contains a transmit...
5276917 Transmitter switch-on in a dual-mode mobile phone  
A method for providing a positive transmitter power switch-on in a dual-mode mobile phone is disclosed. According to the invention the transmitter is switched on in two or more phases, controlled...
5251329 Radio telephone apparatus with microphone mounted in battery case  
A radio telephone apparatus for transmitting and receiving information signals as electrical waves includes a main body section towards one end of which a speaker unit is enclosed. A battery casing...
5248569 Battery door having integrated locking mechanism  
A housing assembly (100) for enclosing a battery (108) and electrical circuitry (107) comprises a housing element (105) formed to enclose the battery (108) and the electrical circuitry (107) and a...
5244755 Battery compartment door and latch having longitudinal snaps  
A housing (202, 602) for an electronic device (700) comprises a battery compartment door (604) having a one-piece molded latch (100). The latch (100) comprises a slide member (102) coupled to a...
5241582 Control for supplying power to car audio and phone systems  
A delay and inverting circuit, connected to the car phone system, is for delaying a status of operation of the car phone system and inverting a signal having a predetermined signal level according...
5239695 Radio-frequency power control circuit of mobile radiophone  
Radio-frequency (RF) power control circuit that facilitates establishment of RF power levels of the mobile radiophone, is disclosed. The circuit maintains constant RF power levels even if the...
5223780 Mobile telephone battery power supply unit with power detection and discharge circuit  
A mobile telephone battery power supply unit consisted of a housing covered with a slide cover to hold an electronic circuit assembly and battery case on the inside. The electronic circuit assembly...
5212836 Power source control circuitry for an automotive portable telephone  
Power source control circuitry for an automotive portable radio telephone which is powered by a power source mounted on a motor vehicle via an adapter. When the telephone is mounted on the adapter,...
5212811 Radio telephone in which an off operation of an operator-activated power switch is inhibited during a talk mode  
A radio telephone apparatus, such as a car telephone, and the method of controlling a radio telephone apparatus, in which the OFF operation of a power source switch caused by an erroneous operation...
5170494 Two piece radio telephone  
According to the invention, the power and weight of a radio telephone can be modified by connecting the same basic unit (1) a desired power unit (2 or 4). The signals received and transmitted...
5170491 Power source switch circuit  
A power supply control circuit for use in an automobile telephone to which power is supplied in response to a power switch signal and to an ignition voltage. The power switch signal is generated by...
5155860 Cellular portable telephone battery pack and programmer interface  
An apparatus that includes various connectors, a battery compartment, and a circuit card is disclosed. The apparatus serves as a battery pack and programmer interface unit (BP/PIU) which mates with...
5136229 Power pack device  
A power pack unit is provided for utilization with battery-operated devices employing rechargeable batteries. The power pack unit specifically is designed for utilization with hand-held, portable...
5126688 Power amplifying apparatus for wireless transmitter  
A power amplifying apparatus according to the present invention can provide a stable electric power output with wide range by controlling both of the output amplifier for amplifying the electric...
5117450 Cellular telephone with standard telephone set  
A unique cellular telephone (100) connects to a standard telephone set (101) for providing cellular telephone services to subscribers in remote locations not served by a landline telephone system....
Matches 451 - 500 out of 529 < 1 2 3 4 5 6 7 8 9 10 11 >