Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 7983354 | Digital broadcast transmitter/receiver having an improved receiving performance and signal processing method thereof A digital broadcast transmitting/receiving system, and a signal processing method thereof, includes a randomizer for randomizing a transport stream into a specified position of which stuff bytes are inserted, a stuff-byte exchanger for replacing the stuff bytes incl... | 07/19/2011 |
| 7804911 | Dual demodulation mode AM radio Apparatuses and methods for receiving an amplitude modulated signal in one of two modes depending on the quality of the received signal. In a first mode, the amplitude modulated signal is converted directly to a baseband signal. In a second mode, the amplitude modul... | 09/28/2010 |
| 7664197 | AM receiving circuit An AM receiving circuit is disclosed which comprises an intermediate frequency amplifying unit that generates an intermediate frequency signal from a broadcast wave signal received by an antenna to amplify and output the intermediate frequency signal; an AGC (Automa... | 02/16/2010 |
| 7453950 | System and method of efficiently modulating data using symbols having more than one pulse A method and apparatus to improve modulation efficiency. A symbol is created in which the relative position of a second pulse is a symbol period encode at least one bit. The symbol is transmitted across a communication channel. The one or more bits modulated by the ... | 11/18/2008 |
| 7418047 | Communication apparatus using a plurality of modulation schemes and transmission apparatus composing such communication apparatus A first signal generation section 11 generates a baseband modulation signal for an ASK modulation scheme from transmission data. A second signal generation section 12 generates a pair of baseband modulation signals for a non-ASK modulation scheme from ... | 08/26/2008 |
| RE40254 | Method and system for realising a fast control channel in a cellular radio network Signalling information is conveyed from a transmitting device (101) to a receiving device (102) in a cellular radio network where user data transmission takes place on a traffic channel in discrete transmission bursts (111-120; 211-220... | 04/22/2008 |
| 7359472 | Method and apparatus for wireless data transmission A method and apparatus for wireless data transmission between a base station and one or more, in particular, passive and/or backscatter-based transponders, in which the base station modulates a carrier signal with a modulation signal, to generate synchronization mar... | 04/15/2008 |
| 7359448 | Remote transmitter system and method A remote transmitter system for vehicle applications includes a remote transmitter for carrying by a user and a receiver for mounting on a vehicle and receiving an amplitude modulated signal. The transmitter is operative to transmit the amplitude modulated signal at... | 04/15/2008 |
| 7349347 | ASK communication device An ASK communication device includes a master station and slave stations connected to the master station through a bus line. The master station includes a transmission unit for ASK-modulating a carrier signal outputted from an oscillation circuit owned thereby and o... | 03/25/2008 |
| 7346119 | System and method for high speed digital signaling The present invention relates in general to a method, apparatus, and article of manufacture for providing high-speed digital communications through a communications channel. In one aspect, the present invention employs adaptive or adjustable equalization circuitry a... | 03/18/2008 |
| 7340010 | Forward error correction coding for hybrid AM in-band on-channel digital audio broadcasting systems An AM compatible digital audio broadcasting signal comprises an analog modulated carrier signal centrally positioned in a radio channel, wherein the analog modulated carrier signal is modulated by an analog signal, and a plurality of digitally modulated subcarrier s... | 03/04/2008 |
| 7340012 | Single and multiple sinewave modulation and demodulation techniques employing carrier-zero and carrier-peak data-word start and stop A method for detecting encoded digital data from a substantially sinusoidal waveform, the encoded digital data having one of a first value and a second value at selected phase angles θn comprises generating the waveform having an amplitude Y defined by a... | 03/04/2008 |
| 7333780 | Polar modulation transmission apparatus and radio communication apparatus A polar modulation transmission apparatus is provided which can adjust synchronization between an amplitude signal and phase signal in a simple configuration accurately and automatically. A polar signal generation circuit 101 sends an amplitude signal and pha... | 02/19/2008 |
| 7313200 | Radio frequency communications systems and methods employing single and multiple sinewave modulation and demodulation techniques A method for generating a substantially sinusoidal waveform containing encoded digital data having one of a first value and a second value at selected phase angles θn comprises generating the waveform having an amplitude Y defined by a first function at ... | 12/25/2007 |
| 7310385 | Single and multiple sinewave modulation and demodulation techniques, apparatus, and communications systems A method for generating a substantially sinusoidal waveform containing encoded digital data having one of a first value and a second value at selected phase angles θn comprises generating the waveform having an amplitude Y defined by a first function at ... | 12/18/2007 |
| 7310383 | Coaxial cable communications systems and apparatus employing single and multiple sinewave modulation and demodulation techniques A method for generating a substantially sinusoidal waveform containing encoded digital data having one of a first value and a second value at selected phase angles θn comprises generating the waveform having an amplitude Y defined by a first function at ... | 12/18/2007 |
| 7310384 | Satellite communications systems and methods employing single and multiple sinewave modulation and demodulation techniques A method for generating a substantially sinusoidal waveform containing encoded digital data having one of a first value and a second value at selected phase angles θn comprises generating the waveform having an amplitude Y defined by a first function at ... | 12/18/2007 |
| 7308044 | Technique for receiving differential multi-PAM signals A technique for receiving differential multi-PAM signals is disclosed. In one particular exemplary embodiment, the technique may be realized as a differential multi-PAM extractor circuit. In this particular exemplary embodiment, the differential multi-PAM extractor ... | 12/11/2007 |
| 7298795 | Wire communications systems and methods employing single and multiple sinewave modulation and demodulation techniques A method for generating a substantially sinusoidal waveform containing encoded digital data having one of a first value and a second value at selected phase angles θn comprises generating the waveform having an amplitude Y defined by a first function at ... | 11/20/2007 |
| 7299012 | Circuit to add and subtract two differential signals An electrical circuit to add and subtract differential input signals may be implemented using distributed differential transmission lines having a length substantially equal to one quarter of a wavelength of the differential input signals according to an effective e... | 11/20/2007 |
| 7298796 | Coaxial cable communications systems and methods employing single and multiple sinewave modulation and demodulation techniques A method for generating a substantially sinusoidal waveform containing encoded digital data having one of a first value and a second value at selected phase angles θn comprises generating the waveform having an amplitude Y defined by a first function at ... | 11/20/2007 |
| 7289028 | Transponder with two supply voltages In a transponder (1) and an integrated circuit (5), the integrated circuit (5) has two circuit sections (18, 19) that are arranged for supply with two supply voltages of different levels (VL-HV, VL-LV), a first rectifier circuit (20 | 10/30/2007 |
| 7289005 | Polar modulator and a method for modulation of a signal A polar modulator contains a phase locked loop which is designed to emit a radio-frequency signal at one frequency to one output, with the frequency being derived from the reference signal and from a phase modulation signal at a control input of the phase locked loo... | 10/30/2007 |
| 7289014 | System for automatically moving access barriers and methods for using the same An operator system and related methods for automatically controlling access barriers including a controller associated with at least one access barrier and a transceiver associated with the controller for transmitting and receiving operational signals. The system al... | 10/30/2007 |
| 7277681 | Interrogator of moving body identification device To reduce the size, weight and cost of an interrogator which is included in an RFID system and required to have a high output power, the interrogator for transmitting a signal shares a radio wave source or a power supply with a portable wireless terminal such as a m... | 10/02/2007 |
| 7263137 | Multivalued FSK modulation system A multivalued FSK modulation system is provided in which when data to be transmitted is multivalued and transmitted/received, the detection level is different every symbol. When a two-valued signal is transmitted as one symbol, data (11), (01), (00) and (10) are pre... | 08/28/2007 |
| 7260361 | Locating interfering devices in wireless networks using channel adaptation metrics A method, apparatus and system relate to detecting an interfering device in a wireless network such as a wireless local area network (WLAN). In wireless networks using orthogonal frequency division multiplexing (OFDM) and adaptive bit loading (ABL), adaptive modulat... | 08/21/2007 |
| 7248639 | Method for reducing the out-of-band emission in AM transmitters for digital transmission A method for reducing out-of-band emission in an AM transmitter for digital transmission includes generating, from a digital modulation signal, an amplitude signal and a phase-modulated radio frequency signal configured to control the AM transmitter. A digital modul... | 07/24/2007 |
| 7230993 | Method and apparatus for modulation using an at least four-dimensional signal constellation A digital communication system (20) in which a signal constellation (30) of a dimensionality of at least four is used, with distance properties chosen to reduce the bit error rate compared to that of digital communication systems using signal constella... | 06/12/2007 |
| 7228100 | Program data display in duplicative digital audio broadcasting system Program data is provided in association with a main audio program to a receiver of a duplicative radio broadcasting system wherein a duplicative broadcast (such as a hybrid IBOC broadcast) includes a primary channel and a backup channel in a predetermined frequency ... | 06/05/2007 |
| 7221718 | I/Q demodulator and I/Q signal sampling method thereof An I/Q demodulator optimized with a minimum amount of hardware. First and second multiplexers generate I and Q signals with respect to an input data signal; and first and second 2-decimation units decimate the I and Q signals generated by the first and second multip... | 05/22/2007 |
| 7197053 | Serializer with programmable delay elements A two-bit serializer circuit as described herein includes programmable delay elements having adjustable phase delay that allows for phase tuning of two parallel input signals relative to an output multiplexer select signal. The two parallel input signals are retimed... | 03/27/2007 |
| 7187716 | Vehicle mounted DSRC apparatus A vehicle mounted DSRC apparatus is capable of achieving reduction in the size and cost thereof. The vehicle mounted DSRC apparatus includes an ASK data generation part 11, an I data generation part 21, a Q data generation part 22, a first band ... | 03/06/2007 |
| 7180954 | Decoding techniques for multi-antenna systems In one embodiment, an MLD scheme for a wireless data communication system including steps (a)–(f). Step (a) includes calculating a first vector length for each of a plurality of complex vectors corresponding to a constellation having a plurality of combinations of... | 02/20/2007 |
| 7164328 | Direct digital amplitude modulator Various embodiments of a direct digital amplitude modulator (DDAM) for modulating radio frequency (RF) or intermediate frequency (IF) or baseband signal with the invented interpolation technique are disclosed. The interpolation technique greatly reduces the amplitud... | 01/16/2007 |
| 7162000 | Delay locked loop synthesizer with multiple outputs and digital modulation A delay locked loop circuit (200) in which multiple outputs are produced. A single delay line (24) is shared among multiple tap selection circuits (256A, 265B, 265C). Fixed phase shifts (412) can be introduced between multip... | 01/09/2007 |
| 7158576 | Orthogonally-multiplexed orthogonal amplitude modulation method An orthogonally-multiplexed orthogonally-amplitude-modulated (OMOAM) method is disclosed. The OMOAM signal is constituted by orthogonally multiplexing M component signals, each constructed by a data-chosen group of L orthogonal pulse-amplitude-modulated basis signal... | 01/02/2007 |
| 7095793 | Digital exciter/phasor/transmitter for directional antennal system A transmission system delays a carrier wave and program audio in the digital domain. The carrier wave and the program audio are converted to analog and the carrier wave is modulated by the program audio. The system includes a master oscillator that generates a digit... | 08/22/2006 |
| 7058373 | Hybrid switched mode/linear power amplifier power supply for use in polar transmitter In one aspect this invention provides a DC-DC converter that has a switch mode part for coupling between a DC source and a load, the switch mode part providing x amount of output power; and that further has a linear mode part coupled in parallel with the switch mode... | 06/06/2006 |
| 7046741 | Single and multiple sinewave modulation and demodulation techniques, apparatus, and communications systems A method for generating a substantially sinusoidal waveform containing encoded digital data having one of a first value and a second value at selected phase angles θn comprises generating the waveform having an amplitude Y defined by a first function at ... | 05/16/2006 |
