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Class 340/7.21 - Two-way paging


Subclass of Class 340 - Communications: electrical
Definition: Subject matter wherein the SCR may additionally transmit
No. of patents: 365
Last issue date: 01/17/2012


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NumberTitleIssue Date
5126733Location information polling in a communication system
A trunked communication system that supports polling requests for location information without requiring infrastructure changes. Ordinary private call talk requests are altered to include at least two inclusions of the ID code for the target communication...
06/30/1992
5095308Transceiver with battery saver and method of using same
A portable transceiver has a battery saving feature which includes a timer, circuit which automatically cuts off the power supply to the receiver and transmitter for relatively long intervals and periodically turns on the power supply for relatively short...
03/10/1992
5086394Introduction system for locating compatible persons
An introduction system for participating users, includes for each user a personal device that is subject to activation by remote paging. Each user, also has a memory device that contains personal data defining the user by personal characteristics such as ...
02/04/1992
5077830Method and apparatus to selectively address recipients and recover missing messages on a broadcast distribution network
The present invention includes a method and apparatus for broadcast distribution of messages and information. Included within the present invention are means for selectively broadcasting messages to specified locales. Further, only the appropriate receive...
12/31/1991
5058205Transceiver squelch control method and apparatus
An audio squelch control for transceiver stations in which all transceivers are initially in a Call mode with the squelch control turned on. While in the Call mode, the squelch control is turned off, enabling the speaker, by receiving the station's coded ...
10/15/1991
5020130Universal frequency assignment protocol for trunked radio systems
A trunked communication system wherein channel assignment information is provided to a requesting subscriber unit in a dual word format that includes separate and specific information regarding both a transmit frequency and a receive frequency. The transm...
05/28/1991
5005014System and method for optimally transmitting acknowledge back responses
A method for providing system acknowledge back responses from a plurality of remote stations to a central station is provided. The system acknowledge back responses include a predetermined station identification number assigned to each remote station and ...
04/02/1991
4984291Coded communication system with shared symbols
A data communication system, including at least one base station and at least one portable module 120, wherein the portable module 120 transmits data on a high frequency, and the base station transmits data on a much lower frequency. Transmissions by the ...
01/08/1991
4977399Mobile radio paging test system
In a ratio paging system of the type having digital data modulated onto radio signals transmitted from a radio station to receiving units at remote sites, a test system. The test system includes a transmitter test module coupled to a radio transmitter at ...
12/11/1990
4951039Animated data display interleaving
A portable communications receiver is disclosed having a receiver for receiving and detecting periodically transmitted selective call paging signals and data signals. In response to the selective call paging signal, a decoder generates control signals whi...
08/21/1990
4947420Communication system
A selective call communication system for use by an untrained person is provided. The communication system includes a number of telephones located in different locations, connected to a central switching unit. A number of selective call radios, each havin...
08/07/1990
4906989Paging system having a vehicle mounted repeater with a portable paging receiver detachably mounted thereon
A paging system allows an on-board radio unit of a vehicle telephone for business use to serve as a repeater as needed. An on-board repeater is mounted on the same vehicle as the on-board radio unit while a portable unit is removably mounted on the repeat...
03/06/1990
4876707Two-directional call forwarding device
According to conventional telephone call forwarding devices, after a party at a telephone set A calls a party at a set B, a set C calls set D to forward the call, and when set D responds to set C, an alternate loop is formed between A and D. In some of sa...
10/24/1989
4814763Paging terminal apparatus with page forwarding capability and methodology thereof
Apparatus and method is disclosed for automatically, or by selective response, call forwarding a message to one or more system pagers which have an acknowledge back capability. In one embodiment, disclosed apparatus automatically forwards a message to ano...
03/21/1989
4788543Apparatus and method for broadcasting priority rated messages on a radio communications channel of a multiple transceiver system
Apparatus in a transceiver for broadcasting priority rated messages on a channel shared by a multiplicity of similar transceivers, converts an analog audio frequency message to compressed digitalized format which is stored, encrypted, and encoded with a p...
11/29/1988
4747122Mobile paging call back system and related method
A mobile paging call back system is provided includes a control unit interconnecting a radio pager, a memory, an indicator, a control switch, and an automatic dialer, with the control unit including a logic circuit programmed: (i) to provide verification ...
05/24/1988
4721955Paging universal remote control system
A paging station remote control system capable of providing analog or binary modulation modes is described. Control of the paging base station is effected through a signalling scheme comprising a combination of tones and timed pauses generated in response...
01/26/1988
4716576Apparatus for controlling transmitter-receiver
An apparatus for controlling a transmitter-receiver which can transmit and receive an aural signal and a data signal. In the transmission mode, the control apparatus detects a data transmission instruction of the transmitter-receiver and changes to the mo...
12/29/1987
4716407Trunked communication system true priority channel scan
While receiving a lower priority message, a remote transceiver unit in a trunked radio communication system is diverted immediately to a priority channel when a priority message is generated. In a first embodiment, a low speed, sub-audible sync word, tran...
12/29/1987
4696054Pocketable wireless transmitter and receiver
A wireless communicating device comprises a receiving circuit for wirelessly receiving message serial number information and a display for displaying the message serial number information. Preferably and additionally, the device may comprise a transmissio...
09/22/1987
4682368Mobile radio data communication system using a speech recognition technique
A mobile radio data communication system wherein a fixed unit transmits an operation command code sequence for an instruction to an operator having a portable unit. A speech synthesizer of the portable unit is responsive to the command code sequence to ge...
07/21/1987
4680785Personal-signaling communication system
A personal-call communication system wherein a personal identification number is assigned to each telephone user, and an arbitrary person is called by wireless by dialing a corresponding personal calling number. The called person sets an ID-card-type port...
07/14/1987
4661972Mobile telephone system for automatically paging absent mobile subscriber
A mobile telephone unit belongs to a mobile telephone system with a mobile telephone system and a paging system which cover an identical service area, are independently operated, and are connected through an exchange. The mobile telephone unit includes a ...
04/28/1987
4646358Signaling arrangement for two-way radio communication
A radio transceiver includes a read only memory (ROM) for storing an origination code and a random access memory (RAM) for storing a destination code. The destination code may be manually entered into the RAM via a keypad or it may be entered remotely fro...
02/24/1987
4644352Radio wave data transmission watch device
A radio wave data transmission apparatus comprises a plurality of switches, a data converter and a transmission section. The switches are selectively activated by a finger tip being moved as if to write a character, thereby providing data showing a charac...
02/17/1987
4644351Two way personal message system with extended coverage
A communications system for carrying messages via a radio channel between one central site of a plurality of central sites and a plurality of two-way remote data units is disclosed. Each central site has a radio coverage area and each remote unit has a un...
02/17/1987
4641364Function coding via digital addresses in a two-way system
Increased efficiency in the use of a communications channel between a Control Unit and a multiplicity of terminal or satellite units by utilizing the combinations of the unit address code words and their complements as coded commands and automatically ret...
02/03/1987
4575582Mobile radio communications system
A mobile radio communications system for wide area mobile radio communications allows any two remote mobile stations to hold communications by way of a public switching network. A fixed station governing an area in which a calling mobile station is locate...
03/11/1986
4517561Selective call, paging and priority signalling system
A selective calling, paging and priority signalling system for two way communications between at least one primary and a plurality of remote stations. An automatic selective calling mode is provided in which the primary station operator enters the address...
05/14/1985
4501017Switch controller for obtaining a plurality of functions from a single switch in a two-way transceiver and method therefor
In a transceiver, a multiple function switch decoder includes means for detecting actuation of the switch and means for monitoring the status of the receiver. A timer responsive to the monitoring means and detecting means establishes a predetermined time ...
02/19/1985
4251865Polling system for a duplex communications link
Channel efficiency in a communications link between a controller and multiple portable units is increased by polling the active units and a set number of inactive units in a sequence where a "poll" consists of sending the binary coded address of the porta...
02/17/1981
4247908Re-linked portable data terminal controller system
A two-way communications system for use with a host computer includes a control unit, a base station and multiple radio/data terminal units. The control unit interfaces directly with the computer but uses a radio link to the portable units. Voice and data...
01/27/1981
4181887Automatic 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
4173016Interpersonal-introduction signalling system
An interpersonal-introduction signalling system includes a receiving and transmitting transceiver having a relatively short range response and of such size as to permit convenient carrying by a person. A code system defines a plurality of categories, each...
10/30/1979
4147984Dual 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
4145655Digitally transmitting transceiver
A transceiver has digital transmitting capability. The transceiver includes an antenna having an input for transmitting signals applied thereto. Signal generating means generate first and second signals having first and second frequencies, and transmissio...
03/20/1979
4069454Transmitter-receiver employing automatic channel hunting and selection
A transmitter-receiver is disclosed for multichannel systems wherein a search for an idle channel is carried out with the help of a second intermediate frequency which is modulated with the station's own call number or with a call number not otherwise use...
01/17/1978
4056781Device for calling a ground station by an aircraft
A ground station system for automatically monitoring a predetermined plurality of carrier frequencies for radio communication calls from aircraft which transmit and receive traffic over one of said carrier frequencies, wherein the aircraft transmits a cal...
11/01/1977
4021608Print-on-the-fly pager
A hand held pager is disclosed which displays a transmitted message in hard copy form on a tape to permit a written record of the message for readout at the convenience of the recipient of the message. The hard copy pager is provided with a printing syste...
05/03/1977
3976995Precessing display pager
A hand held pager is disclosed in which a transmitted message is displayed in alpha/numeric form by a precessing display which moves the received message across the display in a continuous fashion so that the display need be only large enough to present a...
08/24/1976
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