Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 5678198 | System for controlling signal level at both ends of a transmission link, based upon a detected value The present invention is directed to a dynamic range enhancing system for increasing the dynamic range of a transmission link, characterized as either an analog or digital link. The system includes a pre-processing unit, provided at a first location, that... | 10/14/1997 |
| 5678192 | Radio system A radio system, including a fixed radio network having base stations and mobile radio stations. Each mobile station with no ongoing call normally monitors messages transmitted by a base station on a control channel in order to enable a fast call set-up. T... | 10/14/1997 |
| 5678186 | Digital microcells for cellular networks A cellular telephone system is described of the type wherein a plurality of contiguous cells, each having an assigned set of identification codes, are arranged with means for maintaining continuous communication with mobile telephones moving from cell to ... | 10/14/1997 |
| 5678182 | Self-locating radio system that automatically configures to the radio regulations for the location A radio system that determines its location and configures itself according to the radio communication regulations of the location. The radio system includes a reference station and a rover station. The reference station includes a GPS receiver for determ... | 10/14/1997 |
| 5678177 | RF repeaters for time division duplex cordless telephone system The object of the invention is to employ a single amplifier for both the transmit and the receive signals in an RF repeater for interfacing with a base station for exchanging transmit and receive signals in a time division duplex cordless telephone system... | 10/14/1997 |
| 5678207 | Radio/Microphone battery charging assembly A multi-purpose fastening assembly (131) which can be used for both securely fastening and charging an internal battery (113) located within a wireless microphone (103). The fastening assembly (131) includes a head portion (133) and a base plate (135) whi... | 10/14/1997 |
| 5678218 | Circuit for removing random FM noise A circuit which limits to a fixed value the amplitude of a pilot signal received along with a modulated signal, mixes the amplitude-limited pilot signal with the modulated signal, and uses the random FM noise contained in the pilot signal to cancel the ra... | 10/14/1997 |
| 5669065 | Completely redundant communication system utilizing radiating transmission line A radio frequency communication system utilizing a radiating transmission line is disclosed. During normal operation, a mobile communication unit near the radiating transmission line can communicate with other mobile communication units near the transmiss... | 09/16/1997 |
| 5669060 | Method and apparatus for enhancing call set-up and handoff quality In a cellular telephone system, mobile station measurements of received signal strength on each reference frequency are made in order to select a cell. At call set-up in or handoff to that cell, a voice frequency is selected by the system to carry the com... | 09/16/1997 |
| 5669062 | Methods of demand-based adaptive channel reuse for telecommunications systems Methods efficiently assign user channels in a LEO (low-earth orbit) telecommunication system. These methods adapt the channel reuses based on system load or demand. These methods achieve high capacity and minimize interference for the particular situation... | 09/16/1997 |
| 5666649 | Communications system having variable system performance capability System performance in a mobile communications system is improved by detecting whether the mobile unit has a particular capability, and adjusting operation of the base station to improve system performance in response to detection that the mobile unit has ... | 09/09/1997 |
| 5666662 | Method for detecting the location of a mobile terminal In location detection of a mobile terminal, a location inquiry signal is transmitted from one or more base stations to the mobile terminal at predetermined intervals. In response to the location inquiry signal, the mobile terminal transmits a location sig... | 09/09/1997 |
| 5666659 | Method of and structure for increasing signal power over cellular link The clipper contained in the standard cellular transceiver used in cellular telephone networks is effectively prevented from having any effect on a signal by reducing the signal amplitude so that the signal which passes through the clipper does not activa... | 09/09/1997 |
| 5659892 | Operation of low-cost, fixed output power radio in fixed gain mode A method and system for using a low-cost, fixed output power radio in a multi-carrier communication system is disclosed herein. This system measures the output power of the multiple channel units within the system, obtains the current output power of the ... | 08/19/1997 |
| 5659880 | Accelerated synchronization method for a mobile terminal in a mobile radio network A method of synchronizing a mobile terminal in a mobile radio network in which synchronization of the mobile terminal takes place only after determination of the best cell by means of a measurement campaign requests synchronization of the mobile terminal ... | 08/19/1997 |
| 5649295 | Dual mode modulated backscatter system A radio communication system includes an Interrogator for generating and transmitting a first modulated signal by modulating a first information signal onto a radio carrier signal, the first information signal indicating in which of multiple response mode... | 07/15/1997 |
| 5649287 | Orthogonalizing methods for antenna pattern nullfilling A method for broadcasting information in a cellular communication system comprising at least one base station with an antenna array and a plurality of mobile stations is disclosed. The common information is preprocessed to create orthogonal signals. The o... | 07/15/1997 |
| 5649296 | Full duplex modulated backscatter system A duplex radio communication system includes an Interrogator which generates a first modulated signal by modulating a first information signal onto a radio carrier signal. The Interrogator transmits the first modulated signal to at least one remote Tag of... | 07/15/1997 |
| 5640677 | Best server selection in layered cellular radio system A multi-level layered cellular radio architecture serves mobile subscriber stations moving within the system. Best server selection is performed for the mobile stations by assigning within each cell a preference value to each other one of the cells with w... | 06/17/1997 |
| 5640694 | Integrated RF system with segmented frequency conversion An integrated RF avionics system having a common IF interface for diverse functions, such as radar, electronic waveform(EW) and communications/navigation/identification(CNI). The interface uses a segmented band of IF frequencies which are subdivided into ... | 06/17/1997 |
| 5634195 | System and method for setting of output power parameters in a cellular mobile telecommunication system A system and method for automatically determining and setting the optimum output power values on base station and mobile station radio channels in a cellular system. The invention sets power levels for fixed power radio channels, and sets initial and maxi... | 05/27/1997 |
| 5634206 | Method and apparatus for estimating a signal fading characteristic A method and apparatus for measuring a characteristic of a fading signal received using a two or more branch diversity receiver is presented. This fading characteristic is generally proportional to the speed of the user. In a first embodiment the number o... | 05/27/1997 |
| 5630228 | Double balanced mixer circuit with active filter load for a portable comunication receiver A double balanced mixer circuit (50) having a multiplication circuit (10) and an active filter circuit (30) coupled to the multiplication circuit (10). The active filter circuit (30) has a common-base differential amplifier (32) coupled to the differentia... | 05/13/1997 |
| 5630209 | Emergency call system An emergency call system includes a wireless telecommunication network having predetermined radio channels, at least one wireless emergency call transmission device for reading emergency data and transmitting the data in an emergency call message on at le... | 05/13/1997 |
| 5628054 | Portable radio apparatus having batteries for supplying a plurality of voltages A portable radio communication apparatus has a main unit and a detachable and chargeable battery pack. The main unit has a power amplifier (power module) for sending out high frequency power to a whip antenna for transmitting/receiving use and a transmit/... | 05/06/1997 |
| 5628053 | Integrated multilayered microwave circuit and a method of fabricating it An integrated multi-layered microwave circuit includes a substrate which is constituted by dielectric layers and conductive layers laminated alternately. The conductive layer disposed at one major surface of the substrate forms a micro strip line which co... | 05/06/1997 |
| 5625885 | Mobile communication system having pagers for providing two-way data communication between a base station and mobile stations A mobile communication system has a base station and a plurality of mobile stations. When a mobile station detects a self station code, it transmits the self station code of the mobile station to the base station by using weak radio waves. The base statio... | 04/29/1997 |
| 5625890 | Logging recorder system for trunking radio A logging recorder system for trunking radio includes a device which monitors a plurality of channels of the trunking radio system and outputs analog signals representative thereof. A digitizer is then provided for digitizing the analog signals, and a con... | 04/29/1997 |
| 5625886 | Method for forming groups of communication terminals and use of same A method is proposed in which groups are formed by first broadcasting a group definition message (GDM) in which a logical formula (LF) is included expressing conditions (C1-N) on classification parameters of terminals which may have to be included in such... | 04/29/1997 |
| 5613204 | Beacon system for roaming cellular stations A cellular telephone system is upgraded by modifying subscriber units for selective service provider acquisition-during roaming. Priority of acquisition is given to those service providers associated with the home service provider. These preferred service... | 03/18/1997 |
| 5613237 | Housing latch system utilizing an elastomeric interlocking band A latch system for a housing includes front and rear housing sections (204, 202) having a common side periphery (212) when assembled. The housing sections (204, 202) include wall segments (208, 206) projecting therefrom. Each wall segment (208, 206) has a... | 03/18/1997 |
| 5613228 | Gain adjustment method in two-way communication systems A method for minimizing the power used by a remote transceiver in 2-way communication between local and remote transceivers. By repeatedly transmitting a signal with successively increasing power from one transceiver until a response is received from the ... | 03/18/1997 |
| 5613223 | Mobile communicator bracing system A bracing system protects and secures the internal components of a mobile communication system. The bracing system includes an upper housing comprised of a shock resistant material. The upper housing includes a monitor cavity, elevated portions surroundin... | 03/18/1997 |
| 5613220 | Radio communication apparatus A radio communication apparatus which is charged by a charge table comprises a connection unit to connect another communication apparatus, a radio communication unit to communicate a communication signal of another communication apparatus through a radio ... | 03/18/1997 |
| 5606742 | Selectively called radio receiver with bit rate detection for battery at shorter than a frame period In a selectively called radio receiver operable in a battery saving method in which frame synchronism is established after establishment of bit synchronism and in which a bit rate detection signal is produced by detecting a bit rate of an arriving radio s... | 02/25/1997 |
| 5606738 | Frequency conversion circuit with linear feedback A frequency conversion circuit having at least one transistor with an input terminal and an output terminal. A frequency signal to be converted or a local oscillator (LO) signal is input to the input terminal, and a converted frequency signal is output fr... | 02/25/1997 |
| 5606727 | Method and apparatus for adaptive channel assignment in a mobile communication system Each of base stations 2 is positioned in a radio zone composed of three sectors and has a base station controller 3. The base station controller 3 measures upstream interference signal levels in all directions with receiving sector antennas 11, 13, 15 or ... | 02/25/1997 |
| 5604923 | Electronic display system capable of displaying communication signal strength on individual electronic display modules and method of using the same Electronic display system capable of displaying communication signal strength on individual electronic display modules and method of using the same. In one preferred embodiment of the present invention, a pseudo-price change command is transmitted by a ba... | 02/18/1997 |
| 5604927 | Receiver having an adjustable bandwidth filter A radio receiver has a frequency down conversion stage including a first passive filter tuned to a lower frequency. An amplifier functioning as a voltage-to-current converter includes a resistor (60) which can be shunted by a second passive filter in resp... | 02/18/1997 |
| 5603077 | Satellite system and method for remote control of a satellite signal receiver A satellite broadcast system using an airwave message signal to remotely control a signal receiver. The system includes a system manager to issue a message, a message service to broadcast the message in the airwave message signal, and a signal receiver to... | 02/11/1997 |
