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| Number | Title | Issue Date |
| 5408215 | Catalyst monitoring using a hydrocarbon sensor An on-board monitoring system for an automotive emission catalyst [having] has (i) a test chamber remote from the automobile's engine exhaust gas stream; (ii) [means] apparatus for supplying the chamber with sampled exhaust gases sequestered from said str... | 04/18/1995 |
| 5396219 | Security device for protection against pickpockets A security device for protection against pickpockets comprising a clamp intended to be releasably clamped on a top edge of a pocket and connected to a card-size casing by a flexible connecting element is disclosed. The card-size casing is adapted to be re... | 03/07/1995 |
| 5329575 | Idle channel retrieving method and cordless communications system using the same A cordless communication system includes a plurality of cordless communication devices, a plurality of connection units which couple the cordless communication devices and communication lines, and a control unit which controls connections between the conn... | 07/12/1994 |
| 5325438 | Active noise-cancellation system for automotive mufflers In an active control noise-cancelling muffler system, a substantially complete acoustic and mechanical decoupling of the noise-cancelling signal pipe from the gas exhaust pipe is achieved. The noise-cancelling signal delivery pipe is physically isolated a... | 06/28/1994 |
| 5315288 | Method and apparatus for controlling electric circuit output level in backup alarms lighting fixtures, sensors and the like Two volume levels may be produced in a backup alarm merely by reversing polarity of the DC power connections to the circuit of the present invention. The magnitude of output power produced by any device powered by a DC source may be switched between two l... | 05/24/1994 |
| 5315641 | Public switched telephone network access to public data network A system and method for providing Feature Group B or Feature Group D access to the public data network for effecting point of sale transactions such as credit card authorization. The credit card authorization device includes a modem and auto-dialing mecha... | 05/24/1994 |
| 5315260 | Apparatus for converting an AC component of a signal to a square wave An output signal of a magnetoelectrical transducer of a capstan DC motor used in a magnetic tape recorder includes a DC offset voltage. The output signal of the transducer is coupled to a non-inverting input of a first operational amplifier. The output si... | 05/24/1994 |
| 5313657 | Receiver capable of reliably detecting a failure In a receiver comprising a receiver filter (12) with a frequency attenuation band and a pilot oscillator (25) for generating a pilot oscillation signal with a pilot frequency in the frequency attenuation band, a coupler (26) couples the pilot oscillation ... | 05/17/1994 |
| 5313653 | Method for a communication unit to maintain a data base of system services A communication unit within a trunked communication system can reduce control channel traffic by maintaining a data base of the communication system services that it can perform. The data base is maintained by the communication unit selecting a service th... | 05/17/1994 |
| 5313121 | Circuit for processing signals supplied by a zirconium-type oxygen sensor The circuit includes a differential voltage/current converter (V/I) for connection to the sensor (S), a differential transresistance amplifier (TDA) whose inputs are connected to the outputs of the converter (V/I), and a double-ended/single-ended converte... | 05/17/1994 |
| 5305371 | Cordless key telephone system for repeating attempts to alert stations located in interference-affected zones In a cordless key telephone system where adjacent service zones having the same control channel are overlapped, forming an unavoidable interference-affected overlapping zone, a main unit initially selects an access unit from each service zone in response ... | 04/19/1994 |
| 5303416 | Method and apparatus for adjusting peak and valley acquisition rates of a signal received by a radio communication device A radio communication device (100) for receiving a signal comprises tracking circuitry (115) for tracking the signal to acquire peak and valley values of the signal, a threshold detector (150) coupled to the tracking circuitry (115) for determining a cent... | 04/12/1994 |
| 5303292 | Low profile telephone set A low profile telephone set which may be used as a table type model or as a wall mount-type model. The telephone set includes a casing and a holder. The casing is formed with a front bottom surface and a back bottom surface forming a predetermined angle t... | 04/12/1994 |
| 5297214 | Loudspeaker structure A dipole loudspeaker includes a rigid support containing an opening and a generally planar multi-layered flexible diaphragm mounted on the support and extending across the opening. The diaphragm is formed of a plurality of layers of thin flexible membrane... | 03/22/1994 |
| 5297203 | Digital cordless telephone apparatus A digital cordless telephone apparatus comprising a microprocessor based battery powered portable handset unit and a microprocessor based stationary base unit which each transmit and receive digital voice data and digital command data to and from one anot... | 03/22/1994 |
| 5297193 | Wireless telephone network centralized maintenance method A wireless telephone network includes a distribution network having fixed stations and wireless digital telephones linked by radio to the fixed stations, an integrated services digital public switching telephone network to which each fixed station is conn... | 03/22/1994 |
| 5297210 | Microphone actuation control system An improved automatic microphone actuation control system. The system exhibits a high degree of resistance to inappropriate secondary microphone actuation by reverberant sound, even when two or more microphones in a system are operated at significantly di... | 03/22/1994 |
| 5297196 | Facsimile apparatus adapted to communicate via an acoustic coupler An information communication apparatus includes acoustic and non-acoustic couplers, a switch for selectively connecting an information sending source of the apparatus to the acoustic or non-acoustic couplers, a setting unit for selectively setting items o... | 03/22/1994 |
| 5295179 | Portable telephone system having selectable bypass line A portable telephone system includes a first telephone network including a terminal station, a first telephone set connected to the first telephone network via the terminal station, a second telephone network including a communication center which is conn... | 03/15/1994 |
| 5294977 | Television signal detection apparatus An apparatus and method for detecting and logging video outputs from a central control unit to one or more television receivers in which a remote unit in or in proximity to the or each television receiver detects by means of a tuned circuit the horizontal... | 03/15/1994 |
| 5295178 | Digital signal processor for radio base station A digital FM base station radio having a dedicated digital signal processing (DSP) board operates on audio signals from RF links and land lines. The DSP board detects, filters and generates tones and communicates information regarding these tones to a con... | 03/15/1994 |
| 5295191 | Hearing aid intended for being mounted within the ear canal An in-the-ear canal hearing aid comprises a microphone, an amplifier, an electromechanical transducer, for example in the form of a telephone, and an infrared detector. The hearing aid also includes an elongated extraction element for extracting the heari... | 03/15/1994 |
| 5293253 | Facsimile apparatus for receiving facsimile transmission selectively A facsimile apparatus comprises a communication control unit for establishing a connection, the communication control unit sending station identification data to a calling station and receiving station identification data from a called station for identif... | 03/08/1994 |
| 5293514 | Integrating filter circuit An integrating filter circuit having a reference potential source for supplying the integrating filter circuit with a prescribed reference potential, a transconductance circuit provided with a differential circuit, a variable current source couple to the ... | 03/08/1994 |
| 5291195 | Target light for docking A docking target (10) includes three concentric circles (C1, C2, C3) each comprising a plurality of different color light emitting diodes (D1, D2, D3) spaced about the circumference of each circle (C1, C2, C3). During vehicle approach, each circle appears... | 03/01/1994 |
| 5291544 | Method of transferring, between two switching exchanges for mobile services, the handling of an active connection with a mobile terminal When a mobile telephone being served by a cellular mobile radio domain served by a first switching exchange equipped for mobile radio communication through base stations for the respective calls moves over to another mobile radio domain similarly served b... | 03/01/1994 |
| 5291074 | BiCMOS track and hold amplifier A BiCMOS track and hold amplifier provides improved features of pedestal cancellation and feedthrough reduction. A further aspect of the present invention for multi-purpose functional (operational) capabilities, such as an operational amplifier, a track a... | 03/01/1994 |
| 5291559 | Computer speaker A computer speaker assembly 22 is disclosed and includes a tweeter or high-frequency speaker 72 which may be selectively moved in relation to a mid-range-woofer speaker 30. Such movement is accomplished by means of a gear 64 and detent 62 arrangement.... | 03/01/1994 |
| 5289525 | Handover method for radiotelephone networks A handover method for a cellular radiotelephone networks in which, a call having been set up with a mobile via a first transceiver of a first cell, the handover consists in handing over to a second transceiver of a second cell and in switching in the mobi... | 02/22/1994 |
| 5289526 | Cellular system access monitor A cellular system access monitor for monitoring and reporting information relating to the operation of cellular telephone systems. The monitor features a cellular telephone of current design, responding to the expanded spectrum of 832 channels. The cellul... | 02/22/1994 |
| 5289533 | Facsimile transmitting and receiving apparatus A facsimile transmitting and receiving apparatus comprises a facsimile unit having no single-action or abbreviated dialing function connected to a telephone set which provides an automatic dialing device for transmitting a dial single by the single-action... | 02/22/1994 |
| 5289523 | Telecommunications relay service method and apparatus In a telecommunications relay system employing automated text-to-speech for conversion of a text message entered by a sound impaired person, the delay between the completion of the automated text-to-speech conversion and the assignment of a live shared at... | 02/22/1994 |
| 5289521 | Audio/telecommunications system to assist in speech and cognitive skills development for the verbally handicapped A control unit device and system is provided that allows a verbally handicapped person or normal young child to interact with a remote speech development computer system to assist in the development of verbal communications and cognitive skills. The elect... | 02/22/1994 |
| 5289534 | Door ajar signalling device A door phone controller has a door ajar feature for alerting a user that a door was left open. The door phone controller accommodates the door ajar feature in several different ways depending upon how it is configured to interface with the central office ... | 02/22/1994 |
| 5287557 | FM receiver An FM receiver includes an IF unit followed by an LF unit, the IF unit having an IF filter arrangement. The center frequency of the IF filter arrangement, which is relatively narrowbanded with respect to the channel bandwidth, is controlled as a function ... | 02/15/1994 |
| 5287398 | Remotely accessible security controlled audio link The security for a person in a domicile, premise, or dwelling, is increased in the effectiveness thereof, by utilizing a remotely accessible security controlled audio link, which provides a hands free telephone answering system, that operates without the ... | 02/15/1994 |
| 5287400 | Communication control device capable of quickly searching for an idle speech channel in a standby mode in a cordless telephone system In a communication control device which is operable in a standby mode or in an active mode and which is located between a cordless telephone set and a subscriber connected to the device through a telephone line to carry out communication therebetween by c... | 02/15/1994 |
| 5287402 | Data communication apparatus There is disclosed a facsimile apparatus which transmits a predetermined signal, such as CNG signal, during pause periods succeeding the transmission of telephone number signals. This operation prevents the delay of CNG signal detection in case the receiv... | 02/15/1994 |
| 5287558 | FM receiver An FM receiver includes an IF unit followed by an LF unit, the IF unit having an IF filter arrangement. The center frequency of the IF filter arrangement, which is relatively narrowbanded with respect to the channel bandwidth, is controlled as a function ... | 02/15/1994 |
| 5285493 | Radio tele-communication device with received message displaying feature A tele-communication device includes a memory for storing a plurality of pieces of messages transmitted over a communication channel and a display device for displaying the message information read from the memory in response to an operation of a display ... | 02/08/1994 |
