Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7373074 | Video recording apparatus A video recording apparatus includes a tuner for receiving television broadcast waves, an intermediate frequency circuit for demodulating intermediate frequency (IF) signals outputted from the tuner into video signals, a video recorder for recording the video signal... | 05/13/2008 |
| 7352914 | Data processing apparatus A data processing apparatus is provided for detecting distortion of a data signal to which a template signal has been introduced into different frequency bands of the signal. The apparatus includes a frequency component processor operable to generate data representa... | 04/01/2008 |
| 7313753 | Detector for detecting information carried by a signal having a sawtooth-like shape A detector for detecting information carried by a signal having a sawtooth-like shape. The detector includes a first band-pass filter with center frequency around a first frequency value for filtering the signal and generating a first filtered signal, a second band-... | 12/25/2007 |
| 7305173 | Decoding device and decoding method Disclosed is a decoding apparatus for performing decoding processing in keeping with multi-view broadcast. The decoding apparatus includes a picture stream data storage unit (31) for allocating a storage area for each picture stream data and storing the stora... | 12/04/2007 |
| 7292062 | Distribution of signals throughout a spine of an integrated circuit A system and method for distributing signals throughout an integrated circuit (IC). The system comprises a transmitter unit and a plurality of receiver units. The transmitter unit combines a plurality of signals into a serial signal stream and couples the serial sig... | 11/06/2007 |
| 7203325 | Audio processing device An audio processing device for processing an audio input signal comprises one or more noise reducing means, noise level measuring means and control means connected to the noise level measuring means for controlling the noise reducing means. The audio processing devi... | 04/10/2007 |
| 7174087 | Playback apparatus and adaptive equalizing circuit with a phase-locked loop coupled thereto An equalizing circuit is provided for a playback apparatus not requiring tracking control. A playback signal is supplied to a plurality of unit delay devices which are connected in series, and the signals at the input ends and the output ends are supplied to weighti... | 02/06/2007 |
| 7098955 | Optical apparatus operable in static and dynamic image taking modes An optical apparatus includes a photographic optical unit including a movable optical component for varying a focal length, a light amount adjusting unit disposed in an optical path of the photographic optical unit, the light amount adjusting unit varying an apertur... | 08/29/2006 |
| 7057979 | Additional information recording method on optical disk, and optical disk recording apparatus A method of recording additional information of a disk name of an optical disk, title information of a recorded program, etc., on the optical disk. Communication data containing edit data entered through a portable electronic machine capable of conducting wireless c... | 06/06/2006 |
| 7023636 | Information recording/reproducing apparatus A playback error associated with overwriting on a narrow-width track is prevented from occurring in the overwritten portion. A signal generator (11) generates a signal of a predetermined data pattern that stabilizes the operation of a synchronizing pulse gene... | 04/04/2006 |
| 6980784 | System and method of reducing noise in an electronic shelf label system A system and method of reducing noise in an electronic shelf label system which shifts operation of the receiver away from noise frequencies. The system includes a controller for receiving signal levels and noise levels at different frequencies from a homodyne recei... | 12/27/2005 |
| 6975807 | Video tape recorder A video tape recorder includes a rotary cylinder of double-azimuth four-head structure having a pair of main heads and a pair of subheads. When it is detected base on an envelop signal that clogging or the like occurs in the pair of main heads, a controller performs... | 12/13/2005 |
| 6934466 | Buzz reduction circuit and TV/VCR combo using the same Buzz reduction circuit for eliminating a vertical period buzz without being influenced by amplifier circuits in an audio signal line. A video signal of a VCR video head is input to a vertical synchronizing signal separating circuit to separate a vertical synchronizi... | 08/23/2005 |
| 6920278 | Recording/reproduction apparatus and recording/reproduction method A recording/reproduction apparatus and a recording/reproduction method are adapted to information on the recording area of a recording medium without intervention of the operator if the recording medium is short of capacity necessary for recording the information to... | 07/19/2005 |
| 6718120 | Magnetic recording and reproduction method and apparatus In a recording and reproduction method for recording digital data on magnetic tape by a helical scanning method or for reproducing digital data recorded on magnetic tape by the helical scanning method, a plurality of sectors are generated in each track on the magnet... | 04/06/2004 |
| 6480668 | Signal processing circuit A recording apparatus operates in any one of a standard mode and a high-quality mode. The apparatus records a video signal of a standard format during the standard mode of operation. The apparatus records a video signal of a high-quality format during the... | 11/12/2002 |
| 6374035 | Signal processing device A device is arranged to detect the level of an input digital signal by detecting a specific pattern from the input digital signal and to control the level of the input digital signal according to a result of the level detection. The arrangement enables th... | 04/16/2002 |
| 6336001 | Digital recording/reproduction apparatus A digital recording/reproduction method and apparatus includes a data detection circuit for detecting a frequency of occurrence of a specific data value contained in an information signal, and a phase controller for controlling a phase of a sampling clock... | 01/01/2002 |
| 6285821 | External input signal processing circuit for a television receiver with a video tape recorder for the purpose of viewing copy-protected video signals A television receiver with a video tape recorder, in which a common terminal of an external-input changeover switch is connnected to one input terminal of a first changeover switch via an AGC circuit, the other input terminal is connected to an output of ... | 09/04/2001 |
| 6144800 | Noise reduction in correlated digital signals A noise component is extracted from an input correlated digital signal, such as a digital video signal in which image information is substantially the same from one frame to the next. The extracted noise is multiplied by a feedback coefficient that varies... | 11/07/2000 |
| 6101312 | Automatic picture quality controller An automatic image quality-controlling device, where an FM signal output from a video head is amplified in an AGC amplifier to a uniform amplitude level. A lower-sideband variable peaking amplifier peaks the lower-sideband spectrum of the FM signal at abo... | 08/08/2000 |
| 6047102 | Magnetic recording type of photographic apparatus A magnetic recording type of photographic apparatus comprises an iris for controlling the amount of light incident from a subject, an image sensor for converting a light signal obtained through the iris into an electrical signal, a converting circuit for ... | 04/04/2000 |
| 6018610 | Video cassette recorder record compensation apparatus A video cassette recorder (VCR) record compensation apparatus that provides an optimal record environment based on the record time of the tape. This apparatus includes a record amplifier which controls the amplitude of a video signal to be recorded via a ... | 01/25/2000 |
| 6014180 | Automatic gain control loop circuit In an automatic gain control loop circuit supplied with two channel signals alternately input thereto, a first capacitor filter and stores the first signal output from the level detector circuit, and a second capacitor filters and stores the second signal... | 01/11/2000 |
| 5913007 | Envelope detection apparatus for video cassette recorder A video cassette recorder envelope detection apparatus which can accurately detect an envelope reflecting the state of a system. The envelope detection apparatus may include a reference voltage setter for setting a second reference value which is altered ... | 06/15/1999 |
| 5875278 | Recording/reproducing device comprising a plurality of audio channels and a rotary encoder which controls two independent level adjusting means A device for adjusting audio and video signals includes two rotary encoders, one for plural audio adjusting circuits which are arranged to adjust audio signals and the other for plural video adjusting circuits which are arranged to adjust video signals. T... | 02/23/1999 |
| 5835666 | Reproducing apparatus including equalizing means which equalizes a reproduced signal when the signal is between a first and second level and varies the response speed In equalizing a reproduced signal with an equalizer having a variable equalizing characteristic, a decision as to whether or not the equalizing characteristic is to be varied is made by using the reproduced signal. For example, the frequency of performing... | 11/10/1998 |
| 5771333 | Video signal emphasis and deemphasis method and apparatus An input video signal is applied to a transmission line first through a time direction emphasizer for emphasizing the levels of time direction high frequency components of the video signal, relative to the levels of low frequency components thereof; secon... | 06/23/1998 |
| 5765053 | Recording/reproducing apparatus detecting a misrecorded portion A signal, comprising a video signal, an audio signal and the like, is recorded while being frequency modulated, and a signal obtained by frequency demodulating a reproduced signal is subjected to envelope detection. It is thereby possible to detect a blan... | 06/09/1998 |
| 5740309 | Recording signal control apparatus capable of optimizing recording conditions for magnetic recording medium A plurality of test signals of different frequencies are recorded on a magnetic recording medium while gradually increasing or decreasing recording current, and the variation of the level of each of the replayed test signals and the variation of the recor... | 04/14/1998 |
| 5655047 | Video signal frequency modulator having automatic control function and controlling method therefor A video signal frequency modulator having an automatic control function includes a reference generator for generating a sync tip level signal and a white peak level signal, a first switch for selecting one of the sync tip level signal, white peak level si... | 08/05/1997 |
| 5625461 | Recording and reproducing apparatus A recording and reproducing apparatus is capable of editing video signals and audio signals recording additional information data for controlling the reproduction output level. The recording side includes an additional information data generating circuit,... | 04/29/1997 |
| 5579119 | Recording signal control apparatus capable of optimizing recording conditions for magnetic recording medium A plurality of test signals of different frequencies are recorded on a magnetic recording medium while gradually increasing or decreasing recording current, and the variation of the level of each of the replayed test signals and the variation of the recor... | 11/26/1996 |
| 5557417 | Multi-loop testing apparatus with means for adjusting a reproduced video signal Apparatus for adjusting a digital signal which is subjected to analog processing after being reproduced from a record medium includes a digital test signal source, a loop including DAC and ADC for circulating the digital test signal therethrough a predete... | 09/17/1996 |
| 5543976 | Providing transitions of slew rate dependent on pulse frequency A circuit for processing an input pulse signal of which the slew rate is dependent on pulse frequency comprises an amplifier (30; 78) for receiving the input pulse signal and generating an output pulse signal having transitions of which the slew rate is d... | 08/06/1996 |
| 5528379 | Automatic radio frequency signal level control apparatus for a video cassette recorder Automatic RF signal level control apparatus for a VCR which can keep the RF channel signals recorded on or reproduced from a video tape in the same level by compensating for the level difference between the RF channel signals. The apparatus includes a det... | 06/18/1996 |
| 5526136 | Method and apparatus for reproducing a video signal subject to pre-emphasis An image is stably reproduced in a special reproduction mode of still, frame advance or slow motion mode without residual image and/or blur. A video signal reproducing apparatus operates to alternately repeat the steps of interrupting a de-emphasizing pro... | 06/11/1996 |
| 5523896 | Variable speed reproducing apparatus for a digital video cassette recorder A variable speed reproducing apparatus for a digital videocassette recorder which outputs data having an improved C/N ratio. A gate buffer receives a reproduction signal which has been amplified by a pre-amplifier and outputs only that portion of the repr... | 06/04/1996 |
| 5517159 | Frequency modulating system including feedback clamping circuit A frequency modulating system for frequency-modulating an input signal with a predetermined carrier frequency comprising a controller circuit and a frequency modulator is provided. The controller circuit includes an automatic frequency detecting circuit, ... | 05/14/1996 |
| 5517322 | Apparatus for recording and reproducing video signals with preemphasis and deemphasis processes A video signal recording and reproducing apparatus comprises a magnetic tape (4) into which video signals are recorded, A preemphasis circuit (35) modifies the video signals prior to the recording into the magnetic tape (4), so as to increase magnitude of... | 05/14/1996 |
