Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 7761077 | Diversity receiver A diversity receiver receives high rate radio signals (for example DVB-T signals) while the receiver is moving at a high speed (for example in or with a car). Two or more antennas are closely spaced and arranged behind each other in the direction of motion for recei... | 07/20/2010 |
| 7366491 | Noise cancel circuit A raw signal is delayed in a delay circuit (1) and then supplied to one of the input terminals of a selection circuit (8). The raw signal is also supplied to another delay circuit (2) to be delayed. Subsequently, data of this delayed signal is p... | 04/29/2008 |
| 7324840 | Short-range automobile wireless communication device In a short-range on-vehicle radio communication system having in-car radio communication function, a two-way transmission antenna for radio communication is arranged at a panel portion outside a sheet metal chassis of a car navigation unit. As a result, the communic... | 01/29/2008 |
| 7317906 | AM radio receiver An AM radio receiver comprises an RF amplifier, a first mixer that converts the RF signal to a first intermediate-frequency signal, a first bandpass filter that band-limits the first intermediate-frequency signal, a second mixer that converts the output from the fir... | 01/08/2008 |
| 7308289 | Method and system for managing in-vehicle telephony A technique for processing telephone calls from a plurality of telephone sources in a vehicle audio system suitably includes providing a first call using a first one of the telephone sources to a user via the vehicle audio system, notifying the user of a second call... | 12/11/2007 |
| 7269035 | Switching device and related operating method A switching device and a method of operating a switching power element are disclosed for generating a train of drive pulses (D1 to D32) in a basic pattern for a repetition cycle time (T to TF) having leading time intervals (Th1 to Th3, Th... | 09/11/2007 |
| 7260163 | Noise blanker using an adaptive all-pole predictor and method therefor A noise blanker (40, 106) monitors and removes noise from a sampled signal by adaptive filtering (98, 150) the sampled signal to generate trained adaptive filter prediction coefficients. The sampled signal is provided as an output signal when the noise... | 08/21/2007 |
| 7233271 | Noise shaper circuit and method for reducing switching noise Noise that is normally generated during the switching of a noise shaper may be reduced by switching the noise shaper to an inactive or off state after the occurrence of one or more predetermined criteria, for example the detection of a predetermined number of data v... | 06/19/2007 |
| 7215925 | Broadcasting real-time short range RF real-time information to motor vehicles moving along a highway via a sequence of short range RF broadcasting stations along the highway broadcasting to all vehicle transceivers within said range A simple region-specific broadcasting system for broadcasting information pertinent to motor vehicles in sequential regions of a roadway or highway directly to such vehicles when the vehicles are passing through such sequential regions. Existing cellular facilities ... | 05/08/2007 |
| 7197290 | Method for AM band interference suppression via frequency shift Methods are provided for suppressing interference in a motor vehicle radio such as an AM radio from the operating frequency or the harmonics of the operating frequency of a source of time varying signal such as a switching power supply in response to tuning the radi... | 03/27/2007 |
| 7184742 | High frequency device Precision in adjustment of filtering characteristics of a high frequency device is improved by providing a high frequency device comprising a first filter, a frequency converter, and a second filter. The high frequency device comprises a high frequency filter for ex... | 02/27/2007 |
| 7173544 | On-vehicle DSRC apparatus Most of on-vehicle DSRC apparatus are mounted on a dashboard of a vehicle and downsized not to hinder vision. Therefore the number of switches disposed on a panel is limited, while increase in number of functions is expected. Moreover, since an on-vehicle DSRC appar... | 02/06/2007 |
| 7142834 | Noise removing circuit An object is to provide a noise removing circuit that can be integrally formed on a semiconductor substrate and can improve the accuracy of noise component removal. The noise removing circuit comprises a highpass filter detecting a noise component included in an inp... | 11/28/2006 |
| 7116962 | Two-wire power transmitting/receiving device and its method When power is supplied from a power transmitting side device 1, a FET 103 is turned ON and +12V direct current of a power source 101 is supplied to respective power receiving side devices. When transmission data is transmitted from the power tra... | 10/03/2006 |
| 7020549 | Vehicular electronic apparatus suppressed of interference in receiving a broadcast wave A vehicular electronic apparatus contains a microcomputer, and a crystal oscillator for determining an operating frequency for the microcomputer. An oscillation frequency of the crystal oscillator is selected such that a frequency difference between a frequency of a... | 03/28/2006 |
| 7003270 | Electronic apparatus having radio transmitter An electronic apparatus comprising a radio transmitter is disclosed. In a computer system (1) having a radio transmission circuit (3) of a phase modulation type supplied with power from a power supply (4) of a switching type, the switching frequ... | 02/21/2006 |
| 6931235 | Method and apparatus for co-channel interference measurements and base station color code decoding for drive tests in TDMA, cellular, and PCS networks Co-channel interference in a wireless network is identified and quantified. Rather that using color code identification, a more reliable identification property of each co-channel component of the received composite signal is used, namely, the time of arrival of a k... | 08/16/2005 |
| 6931081 | Antenna diversity receiver An antenna diversity receiver is disclosed. The diversity receiver has a multipath detector for controlling an antenna selective switching circuit. The switching circuit couples one of a plurality of antennas to a RF receiver input. The receiver allows suppression o... | 08/16/2005 |
| 6925293 | Antenna diversity system with phase controlled summation of antenna signals An antenna diversity system for receiving frequency-modulated (FM) radio signals with the phase-controlled summation of antenna signals for motor vehicles equipped with a multi-antenna system having at least two antenna output signals, and a receiver with an input f... | 08/02/2005 |
| 6925114 | Weak signal processing based on impulse noise blanking An improved noise reduction system (20) is provided for a radio frequency audio processor having one or more weak signal processing components for generating one or more corresponding control values (36a, 36b) for controlling chara... | 08/02/2005 |
| 6915122 | Method for calibration of a keyless entry system for a motor vehicle Method for calibrating a motor vehicle hands-free access system comprising a control unit (UC) with an emitting antenna (AE) and an antenna controller (PA), consists in: 1. sending to the control unit (UC), from a measurement appar... | 07/05/2005 |
| 6906684 | Controlling a telescopic antenna mast A receiver receives an electromagnetic signal via an antenna mounted on an antenna mast. A signal evaluator determines or measures a signal quality level associated with the received electromagnetic signal. The signal quality compares the determined signal quality l... | 06/14/2005 |
| 6826392 | Multipath noise reduction method, multipath noise reducer, and FM receiver A multipath noise reducer extracts a high-frequency signal from a demodulated signal obtained from a frequency-modulated signal, and generates a noise reduction coefficient from the extracted high-frequency signal. The demodulated signal is also separated into high-... | 11/30/2004 |
| 6809688 | Radio communication device with integrated antenna, transmitter, and receiver A dielectric multilayer substrate 220 is formed by laminating first through third dielectric layers 201 through 203. A plurality of conductor patches 204a through 204d are arranged on the upper surface of the first di... | 10/26/2004 |
| 6725027 | Multipath noise reducer, audio output circuit, and FM receiver A multipath noise reducer detects and removes the individual noise spikes occurring in an interval of multipath noise, thereby reducing the multipath noise with minimal distortion of the audio output signal. The multipath noise spikes are detected by comparing a rec... | 04/20/2004 |
| 6324382 | Extraction of primary and co-channel signals Apparatus for extracting a primary signal from a GSM signal containing co-channel interference partitions a signal burst into successive segments. Known characteristics of the GSM signal channel are used to estimate propagation path characteristics in res... | 11/27/2001 |
| 6272360 | Remotely installed transmitter and a hands-free two-way voice terminal device using same A remotely installed transmitter capable of clearly picking up only the voice of a person who is talking despite being installed away from the speaker's mouth and without causing feedback despite increased sensitivity, and a hands-free two-way voice termi... | 08/07/2001 |
| 6269090 | Telecommunication system, radio system, and method In known telecommunication systems comprising two separate radio systems each one using its own clock signal for defining its channels multiplexed in time, said radio systems cause too much interference with each other. By introducing a coupling between b... | 07/31/2001 |
| 6181924 | Method and system for rejecting interfering signals A method and system for rejecting interfering signals in a wireless communication system employing antenna diversity. According to the method, the angle between an interfering signal and a desired carrier signal is determined and used to estimate an offse... | 01/30/2001 |
| 6061554 | Electromagnetic interference suppressing device An electromagnetic and/or electric interference suppression device that reduces the severity of electromagnetic and/or electric interference of an asymmetric system. The suppression device utilizes an antenna to develop a voltage that is ideally equal to ... | 05/09/2000 |
| 5995817 | Device for varying the cutoff frequency of a low-pass filter For eliminating the emphasis given an audio signal in the transmitter, an audio signal processor of an audio device (e.g., a car radio) contains a low-pass filter. In order to attenuate the spurious higher-frequency signal fractions in case of poor recept... | 11/30/1999 |
| 5949291 | Cordless telephone with digital frequency adjustment A digitally-controlled frequency synthesizer circuit is provided. The synthesizer circuit has a synthesizer that provides as an output a signal that is based on a reference frequency supplied from a resonator circuit. The reference frequency of the resona... | 09/07/1999 |
| 5903819 | Noise suppressor circuit and associated method for suppressing periodic interference component portions of a communication signal A noise suppressor, and associated method, suppresses periodic noise components of a communication signal. The period of the periodic noise components of the communication signal is determined by correlating the communication signal with the communication... | 05/11/1999 |
| 5890059 | Impulse noise blanking apparatus A method and apparatus for suppressing noise in a radio receiver or the like due to electromagnetic interference generated by the firing of a spark plug which coordinates the operation of a noise blanker with the EST signal generated by an electronic engi... | 03/30/1999 |
| 5872852 | Noise estimating system for use with audio reproduction equipment The disclosed system for estimating the ambient noise level in a listening space includes a memory for storing a plurality of noise values at memory locations therein, each of the noise values being representative of the ambient noise in the listening spa... | 02/16/1999 |
| 5584052 | Integrated microphone/pushbutton housing for voice activated cellular phone A voice controlled vehicle accessory system is responsive to voice commands and/or manual commands wherein the manual commands are entered via a single pushbutton 16 having multiple functions depending upon the instantaneous state of a system controller 1... | 12/10/1996 |
| 5519889 | Method and apparatus to conceal RF interference in AM radio reception caused by a switch mode power supply A method and apparatus is disclosed in which a transformer which has at least one DC output and one input, and a precision timer which generates a control signal having a frequency within a predetermined range of an integer multiple of the carrier frequen... | 05/21/1996 |
| 5418814 | Threshold cancellation means for use in digital mobile radio networks In a direct sequence spread spectrum code division multiple access receiver using interference cancellation, the signal for cancellation is derived by demodulating the unwanted signals and re-modulating a carrier to create a near replica for subtraction f... | 05/23/1995 |
| 5400039 | Integrated multilayered microwave circuit 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... | 03/21/1995 |
| 5390341 | System and method for muting and unmuting a communication device A system (200) for muting a portable radio (104) includes a mobile radio (106) having a mute switch (108). Upon activating the mute switch (108), a signalling message is generated (ISW) by radio (106) that is in turn transmitted to the system central cont... | 02/14/1995 |
