|
Match
|
Document |
Document Title |
|
|
5095541 |
Radio telephone apparatus
A portable telephone apparatus which is capable of being selectively connected to an adaptor unit for transmitting a radio frequency (RF) signal at a certain power level in response to a level...
|
|
|
5054115 |
Radio telephone apparatus
A radio telephone apparatus including a portable radio device capable of being mounted on and carried out from a vehicle such as an automobile in use. The portable radio device has a...
|
|
|
5046131 |
Portable radio transceiver apparatus
A radio transceiver apparatus is provided which includes (1) a radio transceiver carrying a removable battery pack which is charged when the radio transceiver is set on a holder including a...
|
|
|
5036532 |
Portable telephone with power source/mode change during calls
A unique cellular portable telephone (100) automatically accommodates a power source change during a cellular telephone call between the portable's battery (300) and another battery or an external...
|
|
|
4995072 |
Self-powered base and remote telephone communication set
A cordless remote telephone unit communicates with a telephone line through a stationary self-powered base unit. The base unit is not plugged into an electrical household receptacle and is...
|
|
|
4974250 |
Adapter for mounting a portable telephone on a vehicle
An adapter for mounting a portable telephone on a vehicle allows either one of a simple handset and a multi-function handset to be used therewith as desired. The adapter does not need a power...
|
|
|
4969206 |
Portable data collection device with RF transmission
A portable data collection device having RF communication capabilities. This device contains circuit boards arranged in such a manner to shield the CPU board from the RF transmission components....
|
|
|
4962523 |
Radio telephone set used as portable set and vehicle-mounted set
A radio telephone set comprises switch circuitry, a telephone circuit and a battery for portable operation, which battery may be a built-in battery. When the radio telephone set is not mounted on a...
|
|
|
4908846 |
Mobile telephone terminal having function to perform call clear process
A mobile telephone terminal includes a portable-unit and an adaptor which is capable of mounting the portable-unit on a vehicle and supplying power from a vehicle battery to the portable-unit. The...
|
|
|
4903326 |
Detachable battery pack with a built-in broadband antenna
A detachable battery pack with a built-in broadband antenna is disclosed. Since the antenna is wholly contained within the battery housing, it is protected from damage and is detachable from the...
|
|
|
4893348 |
Power source control device in car telephone mobile station system
A power source control device in a car telephone mobile station system where an abnormal state detecting means installed within a body CPU supervises signals transmitted from a hand set CPU, and if...
|
|
|
4873712 |
Telephone controlled interrupter circuit
A control unit is inserted in the power lines that serve a vehicular telephone and an audio system. A power monitoring circuit detects current increases related to operation of the telephone,...
|
|
|
4868862 |
Automobile telephone unit
An automobile telephone unit (T) has a main body (11) located in a prescribed position in the cabin of an automobile, a telephone number dialing device (D) electrically connected to the main body...
|
|
|
4845772 |
Portable radiotelephone with control switch disabling
A portable radiotelephone with control switch disabling is disclosed. A flip element which contains a microphone and covers a keypad and other control buttons when in a closed position also...
|
|
|
4792986 |
Portable radio system with externally programmable universal device connector
A computer-controlled portable radio communications device has RF and audio circuits controlled by a programmed computer in accordance with a predetermined modus operandi and includes an externally...
|
|
|
4723265 |
Abreviated dialer with reduced key operations
A microprocessor-based telephone set includes a telephone number memory, a number indicator, an abbreviated number selecting switch, an abbreviated number controller, and a selecting signal...
|
|
|
4647722 |
Land mobile telephone system
The present invention relates to a land mobile telephone system with enhanced operability realizing both the loud-speech and closed-speech operations by the single handset. The handset is installed...
|
|
|
4593409 |
Transceiver protection arrangement
A warning and protection circuit arrangement suitable for use in conjunction with a two-way portable transceiver having a removable battery pack/antenna includes a battery enclosure containing an...
|
|
|
4585903 |
Cordless telephone
A cordless telephone system which provides improved performance through a number of moved circuits including the use of a single oscillator in a remote unit for providing both a standard for the...
|
|
|
4558177 |
Regulated output current source for cordless telephones
A circuit for providing a constant current to an output stage of a cordless telephone transmitter using AC power lines as a transmission medium to maintain the RF component on the AC lines to...
|
|
|
4509201 |
Wireless telephone apparatus with protection against power loss
Two limit voltages are established for a wireless telephone apparatus. If the power supply voltage exceeds the first limit voltage, the transmitter of the wireless telephone apparatus is prevented...
|
|
|
4363935 |
Mobile radio telephone system
A vehicle radio telephone system includes, in addition to a handset associated with a telephone set, a wireless microphone detachable from the telephone set and a telephone receiver comprising a...
|
|
|
4221932 |
Infrared remote signaling system
A hands-free telephone system is disclosed utilizing an infrared transmitter and receiver to permit wireless speech transmission. The transmitter uses frequency modulation imposed on the infrared...
|
|
|
4087638 |
DTMF Communication system
A highly flexible and economical dual tone multiple frequency (DTMF) communication system includes a data input source such as a keyboard; a repertory dialer or electronic memory; an integratable...
|
|
|
3806663 |
RADIO TELEPHONE SUBSCRIBER UNIT
Disclosed is a radio telephone subscriber unit for communicating with a telephone company base terminal wherein control signals are transmitted between the base terminal and the subscriber unit for...
|
|
|
3535689 |
METHOD AND CIRCUIT ARRANGEMENT TO CONNECT SUBSCRIBER TELEPHONE STATIONS AND HANDSETS VIA RADIO IN TELEPHONE SYSTEMS
|
|
|
3484557 |
SUPERVISORY SIGNALING OVER RADIO-TELEPHONE SYSTEM
|
|
|
3382426 |
Voltage converter and converter switching arrangement
|
|
|
3307051 |
Energizing system
|