| Patent Number |
Title Of Patent |
Date Issued |
| 6229794 |
Selective call device and method for monitoring at least two communication systems |
May 8, 2001 |
| A selective call device (106) for monitoring at least two communication systems. The selective call device (106) has a receiver (204) for receiving information from a first communication system (110), a processor (206) for referencing a time slot assignment on the first communication |
| 6101370 |
Method and apparatus used in a simulcast radio communication system for providing improved local |
August 8, 2000 |
| A technique is used in a simulcast radio communication system (200) for providing improved local time information. The technique includes, in a fixed portion (300) of the simulcast radio communication system (200), alternatively transmitting in a radio signal a first local time and a |
| 5956640 |
Messaging system providing flexible roaming and method therefor |
September 21, 1999 |
| A message transmission system (100) and method for providing flexible roaming to a receiving device (126) which includes a code memory (422) which stores addresses of a first type (1202) to enable reception of messages within a local geographic area, and an address of a second type ( |
| 5635914 |
Method and apparatus for dynamic group calling in a selective call system |
June 3, 1997 |
| A selective call system provides dynamic group calling by transmitting a paging message (FIG. 10) to each data communication receiver in a defined group. The paging message comprises a group call address (1040) and frame (1050) and phase (1060) information identifying when the group mess |
| 5625351 |
Messaging system having roaming capability |
April 29, 1997 |
| A messaging system capable of transmitting messages to receivers which roam between coverage areas. In one configuration, a coverage area (100) is divided into a plurality of zones (110). A single simulcast system identification (SSID) number is assigned which consists of a local ide |
| 5610919 |
Network identification information placement architecture for messaging system having roaming ca |
March 11, 1997 |
| Network roaming information (NRI), which comprises identifies a network (200) and a service area (210) within the network (200), a receiver address, is transmitted in a network (200) during a predetermined number of time slots of a signal, whereby the signal is transmitted in consecu |
| 5600312 |
Messaging system and method having roaming capability and controlled group messaging |
February 4, 1997 |
| A messaging system and method capable of transmitting group messages throughout a Network (200) such that receivers which are outside of a "local" or "home" area of coverage receive such group messages, whereas receivers which are in a "local" area of coverage over ride and do not re |
| 5555183 |
Method and apparatus for synchronizing to a synchronous selective call signal |
September 10, 1996 |
| A selective call receiver (111) receives a synchronous selective call signal (99) having synchronization portions (102 and 104) and a frame identification portion (106). Upon finding the signal the selective call receiver's bit and frame synchronizers (126 and 128) synchronize to a f |
| 5546394 |
Message fragmenting in a time diversity radio system |
August 13, 1996 |
| A time diversity communication system (150) comprises a messaging terminal (154), a queue (156) at the messaging terminal for queuing incoming messages, an encoder (158) for encoding a first fragment of a message and the remaining fragments of a message, a transmitter (160) for repeatedl |
| 5493282 |
Addressing method for conserving power in distributed information receivers |
February 20, 1996 |
| A communication receiver (106) receives an address code word (1800) of a transmitted message, the message comprising the address code word (1800) and an associated data portion (1610), the address code word comprising an address portion (1802,1804). The communication receiver (106) corre |
| 5475863 |
Method and apparatus for delivering messages to portable communication units in a radio communic |
December 12, 1995 |
| A method of locating a portable communication unit (108) having a transmitter (852) for transmitting acknowledge back signals, consists of the steps of transmitting, to the portable communication unit (108) from the communication cell transmitters (104), an information signal which c |
| 5455579 |
Digitized stored voice paging receiver |
October 3, 1995 |
| A paging receiver device and method are disclosed in which analog information transmitted from an external source such as a paging transmitter are received and decoded. The analog information includes at least one voice message. The voice message is recovered, digitized, and stored i |
| 5371737 |
Selective call receiver for receiving a multiphase multiplexed signal |
December 6, 1994 |
| A selective call receiver receives a signal having a baud rate and comprising a number of phases. The number of phases are time division multiplexed to form the signal. The selective call receiver has selective call address information assigned thereto and includes a receiver for rec |
| 5325088 |
Synchronous selective signalling system |
June 28, 1994 |
| A selective call receiver (111) has a first mask (134A) stored within the selective call receiver (111) indicative of a first period of reception for receiving a transmitted communication signal (99) having a plurality of packets (100). Each of the transmitted packet (100) has message |
| 5311516 |
Paging system using message fragmentation to redistribute traffic |
May 10, 1994 |
| A selective call receiver (106) receives one or more message packets of a transmitted fragmented message, where each of the one or more message packets includes an address (1605) and message data (1610), and the message data (1610) includes an indication (1702) of whether more message |
| 5252963 |
"Selective call receiver" |
October 12, 1993 |
| In a battery powered selective call receiver receiving a synchronous signal, a battery saving method extends battery life by optimizing the amount of time the receiver circuit is activated when searching for the signal after previously acquiring synchronization. The battery saving me |
| 5208833 |
Multi-level symbol synchronizer |
May 4, 1993 |
| A symbol synchronizer for a communication receiver receiving multi-level data signals includes a reference clock generator for generating a reference clock signal having a predetermined time period, a state change detector for detecting state changes occurring within the received mul |
| 5206855 |
Multiple frequency message system |
April 27, 1993 |
| A transmitter system for transmitting coded message signals on a plurality of channels of which at least one channel to be assigned to each of a plurality of geographical areas. The coded message signals include channel identification information and message information being transmitted |
| 5168493 |
Time division multiplexed selective call system |
December 1, 1992 |
| A signalling protocol comprising a plurality of interleaved phases is transmitted at various baud rates, the various baud rates being multiples of a base baud rate. The signalling protocol allows a selective call receiver to decode at an operating baud rate equivalent to the base baud |
| 5089813 |
Method of super battery saving in a selective call receiver |
February 18, 1992 |
| A paging receiver receives a message signal having an address field and a data field. The message has at least one address within the address field and a plurality of packets in the data field. The data packets contain a predetermined amount of information. A method for conserving power |
| 5051993 |
Mixed modulation level communication system |
September 24, 1991 |
| A communication system has an information signal having a plurality of data streams. The data streams are simultaneously modulated on a multi-level symbol transmission. The data streams may have either independent or dependent signalling protocols. A transmitting device generates the |
| 4965569 |
Digitized stored voice paging receiver |
October 23, 1990 |
| A paging receiver device and method are disclosed in which analog information transmitted from an external source such as a paging transmitter are received and decoded. The analog information includes at least one voice message. The voice message is recovered, digitized, and stored i |
| 4914649 |
Multiple frequency message system |
April 3, 1990 |
| A multiple frequency message system includes a transmitter for transmitting coded message signals on a plurality of channels of which at least one channel to be assigned to each of a plurality of geographical areas. The coded message signals include channel identification information and |
| 4873520 |
Paging receiver for storing digitized voice messages |
October 10, 1989 |
| A selective call paging receiver for receiving analog voice information converts the analog information to digital information and stores the digital information in a memory of the paging receiver. In a first embodiment, the paging receiver includes a hardware controlled decoder and |
| 4803703 |
Apparatus and method for fine synchronization of a communication receiver |
February 7, 1989 |
| A system and method is described for synchronizing a paging receiver decoder to receive information in the form of digitally encoded signals. The digital signals include a synchronization signal followed by message data. The synchronization signal includes a first and second portion of |
| 4803487 |
Portable communications receiver with separate information presentation means |
February 7, 1989 |
| A personal message receiving apparatus is described including a portable communications receiver, intended to be carried by the user, which receives, detects and stores messages transmitted on a first radio frequency communication channel. The stored message is then subsequently tran |
| 4412217 |
Pager with visible display indicating status of memory |
October 25, 1983 |
| A radio pager decoder including a register which is incremented when a page is received and a visual indicator which displays a count of the number of received pages. Pages may also be selectively retrieved from memory. |
| 4385295 |
Pager with visible display indicating unread messages |
May 24, 1983 |
| A paper with a visual display comprises a radio receiver, means for identifying a desired recipient of signals on the radio receiver, means for storing a signal received on the receiver, means for displaying the number of messages received during a given interval, and means for display |
| 4151367 |
Data sync acquisition in an asynchronous binary address decoder |
April 24, 1979 |
| Synchronization for data sampling pulses in a two-way alphanumeric data terminal is provided by utilization of signals present in the page address decoder circuitry. Microprocessor power-up timing is also obtained from the same signals. |
