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| Number | Title | Issue Date |
| 4184115 | Mobile citizen band transceiver control unit with an audio frequency apparatus A mobile citizen band transceiver (hereinafter referred to as CB transceiver) control unit with an audio frequency apparatus includes a radio receiver, an instrument panel at which the radio receiver is installed in an in-dash mounting, a channel selectin... | 01/15/1980 |
| 4181887 | Automatic channel selector for a two-way transceiver in a multichannel communication system The channel selector employs a technique in which a tone calling system is combined with a scanner. The combination of these devices provides the user a convenient method of effectively monitoring all channels and automatically selecting the channel upon ... | 01/01/1980 |
| 4180776 | Automatic channel scanning attachment for manual CB radio transceiver An automatic channel scanning attachment is described for connecting to a CB radio transceiver having a manual channel selection. The attachment is designed to automatically manipulate the manual channel selector to scan the channel to select an active ch... | 12/25/1979 |
| 4178547 | Remote microphone with approved channel selector A microphone, which may be hand held for use in association with a radio transceiver, including transceivers commonly known as Citizen Band Radios, has novel means associated with the microphone for selecting and indicating the receiving or broadcasting c... | 12/11/1979 |
| 4162446 | Transceiver with only one reference frequency A transceiver includes a first mixer and a detector in the receive signal path and a second mixer and modulator in the transmit signal path, all of which are coupled to and are operated by programmable counter circuits clocked by a single reference freque... | 07/24/1979 |
| 4162447 | Frequency synthesis method for an AM-SSB transmitter-receiver A frequency synthesis method for an AM-SSB transmitter-receiver using a phase locked loop type synthesizer, having the steps of supplying a mixer with an offset frequency of an offset oscillator or a multiplied frequency thereof and an output frequency of... | 07/24/1979 |
| 4161695 | Transmission and reception control circuit for a transceiver A transmission and reception control circuit for a transceiver adapted to compare the output frequency of a fixed frequency divider with that of a variable frequency divider thereby to automatically control the output frequency of a voltage-controlled osc... | 07/17/1979 |
| 4153877 | Mobile CB transceiver A mobile citizens band radio transceiver having the circuitry partitioned so as to permit the chassis housing the receiver circuitry, transmitter circuitry and frequency synthesizer circuitry to be installed in a remote location in a motor vehicle such as... | 05/08/1979 |
| 4149125 | Frequency synthesizer for transmitter receiver using a phase locked loop A frequency synthesizer for use in a transmitter/receiver, comprising a voltage controlled oscillator, a programmable frequency divider for dividing the frequency of the output from the voltage controlled oscillator, a reference oscillator, a reference co... | 04/10/1979 |
| 4147904 | Microphone with channel selector and push-to-talk button interlock A microphone having a push to talk switch button extending through a slot in one side of the microphone and a channel selector switch knob extending through at least one other slot in the microphone. An interlocking structure, having at least one finger e... | 04/03/1979 |
| 4147984 | Dual digital processor transceiver A transceiver includes a keyboard having a plurality of manually actuable keys for selecting operating modes and channels for operating thereon. A first digital processor has inputs coupled to the keyboard for receiving logic signals therefrom of a first ... | 04/03/1979 |
| 4146839 | Channel traffic monitoring radio transceiver A channel traffic monitoring radio transceiver having basic transceiver components in combination with a microcontroller which provides the electronic operations which enables the transceiver to automatically establish the least congested channel of commu... | 03/27/1979 |
| 4145656 | Transceiver capable of sensing a clear channel A transceiver receives electronic input signals comprised of a plurality of frequency bands lying within a plurality of non-overlapping frequency channels. A mixer frequency shifts a selected band to a predetermined center frequency in response to a first... | 03/20/1979 |
| 4132950 | Clarifying radio receiver A clarifying radio receiver has a charge transfer device filter which is coupled to receive input signals consisting of a plurality of frequency bands lying respectively within a plurality of non-overlapping frequency channels. The filter simultaneously r... | 01/02/1979 |
| 4110690 | Channel selecting device A channel selecting device having a channel setting generator for generating channel-number increasing or decreasing signals for channel selection, a logic system provided with a channel-code generating circuit for changing the channel code according to t... | 08/29/1978 |
| 4092594 | Crystalless scanning radio receiver controlled by processing means An FM receiver and transmitter apparatus is disclosed which is of the superheterodyne type and is capable of scanning and receiving a plurality of channels on a plurality of frequency bands as well as transmitting on a plurality of channels. The receiver ... | 05/30/1978 |
| 4070626 | Radio telephone with channel switch In a radio telephone device including a channel selector containing at least one frequency divider having a plurality of control inputs each associated with a respective frequency dividing ratio and each arranged to receive an electrical signal for influe... | 01/24/1978 |
| 4061973 | Synthesizer The synthesizer uses phase lock loop techniques to generate either the carrier signal for an associated transmitter or the injection signal for an associated receiver. A programmable divider controls the specific channel to which the synthesizer tunes the... | 12/06/1977 |
| 4054837 | Bidirectional radio frequency amplifier with receiver protection A bidirectional radio frequency amplifier which includes a power amplifier and a receiver amplifier connected to a common antenna. A pair of parallel diodes coupled across the input of the receiver amplifier provides a high impedance path for a received s... | 10/18/1977 |
| 4045739 | Combined transceiver and radio unit The unit incorporates a transceiver, having a channel changing mechanism, and a radio, having a tuner, a tone control and a balance control, together with a volume control in a common housing having a front wall, for conjoint mounting of the unit in an au... | 08/30/1977 |
| 4032844 | Combination microphone, speaker, and control unit for a radio transceiver A combination microphone, loudspeaker, and control unit is disclosed which is adapted to be coupled by a multiconductor cable to a radio transceiver which is capable of transmitting and receiving a plurality of radio signals at preselected frequencies. A ... | 06/28/1977 |
| 4027242 | Double superheterodyne multichannel receiver with a phase-locked loop frequency synthesizer A double superheterodyne receiver having a single local oscillator which supplies a signal of a predetermined frequency to a second frequency converter or mixer, where a second intermediate frequency signal is produced for final detection. The local oscil... | 05/31/1977 |
| 4009451 | Frequency range selectable oscillator for multichannel communication system To provide the required multiple channels for an aircraft communications system, a crystal controlled reference oscillator includes a tunable circuit for changing the base reference frequency provided by a crystal. The base reference frequency of the crys... | 02/22/1977 |
| 3982188 | Station selecting device having improved noise discrimination circuitry A multi-channel communication system including automatic station selecting circuitry and circuitry for preventing actuation of the station selection circuitry by noise or the like. The station selecting circuitry automatically, sequentially generates a pl... | 09/21/1976 |
| 3967244 | Apparatus for the wireless transmission of a control signal to the control path of a controlled semiconductor valve A circuit arrangement for the wireless transmission of a control signal to the control path of a semiconductor valve. In particular, the circuit arrangement is provided with a separating filter which is connected to a remote-indication receiver and which ... | 06/29/1976 |
| 3947766 | Combined transceiver and radio unit The unit incorporates a transceiver, having a channel changing mechanism, and a radio, having a radio tuner, enclosed in a common housing for conjoint mounting. A transceiver control shaft has an inner end in operative connection with the channel changing... | 03/30/1976 |
| 3943444 | Procedure to watch several radio channels at radio communication During communication in a system for radio communication where stations are called with selective calls the participating stations watch for priority calls on a number of other radio channels. The watching is performed by listening in to the other channel... | 03/09/1976 |
