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Inventor

Hirohisa Yamaguchi

Inventor
Tokyo, JP

Overview

49→
Patents
1980–2013
Patent span
Electricity
Primary field (CPC H)

Patents· 49 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H04Nprimary
H04NPictorial communication, e.g. television24%
G11BInformation storage based on relative movement between record carrier and transducer19%
H04BTransmission11%
H04LTransmission of digital information, e.g. telegraphic communication8%
G06FElectric digital data processing6%
G06TImage data processing or generation, in general6%
H03MCoding5%
H04JMultiplex communication4%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%
H03GControl of amplification3%
PatentTitleYear
8,472,555'Ultra wideband interference cancellation for orthogonal frequency division multiplex transmitters by protection-edge tones'20137,668,265'Ultra wideband interference cancellation for orthogonal frequency division multiplex transmitters by protection-edge tones'20107,573,960'Narrow band interference cancellation technique for OFDM transmitters'20097,542,846'Navigation system utilizing XML/SVG map data converted from geographic map data and layered structure of XML/SVG map data based on administrative regions'20097,388,899'Spreading code structure for ultra wide band communications'20087,327,385'Home picture/video display system with ultra wide-band technology'20087,184,485'Time-domain windowing of multi-band OFDM system to enable spectral sculpting'20077,110,782'Cell search synchronization'20067,099,270'Multi-path equalization for orthogonal frequency division multiplexing communication system'20067,092,537'Digital self-adapting graphic equalizer and method'20066,947,952'Method for generating unique object indentifiers in a data abstraction layer disposed between first and second DBMS software in response to parent thread performing client application'20056,816,553'Coding method for an image signal'20046,801,588'Combined channel and entropy decoding'20046,697,492'Digital signal processing acoustic speaker system'20046,687,376'High-speed long code generation with arbitrary delay'20046,480,503'Turbo-coupled multi-code multiplex data transmission for CDMA'20026,272,661'Minimum memory implementation of high speed viterbi decoder'20016,249,551'Video playback method and system for reducing access delay'20016,236,763'Method and apparatus for removing noise artifacts in decompressed video signals'20016,188,714'Parallel M-sequence generator circuit'20015,878,173'Pipeline image processing method and device for computing image block on half-grid'19995,838,967'Image filing apparatus and method for storing image data and directory information'19985,815,602'DCT image compression and motion compensation using the hadamard transform'19985,786,857'Image processing system'19985,765,160'Object-oriented database, a method for registering triggers for processing at end of a transaction'19985,511,155'Method and device for synthesizing all-objects-in-focus images'19965,335,081'Multiple display presentation system capable of sequencing prerecorded scenes for joint reproduction'19945,172,242'Visual presentation system employing two or more video disk players for providing as many correlated images'19925,146,369'Data copying method for disk storage medium'19925,140,425'Visual presentation system providing for a wiping change from one scene to another'19925,117,193'Drop-out detection circuit'19925,084,836'Parallel signal processing system'1992RE033506'Disc inclination detecting apparatus'19904,958,234'Distortion eliminating circuit'19904,933,925'Optical tracking control apparatus for controlling a tracking of a light beam which scans an information recording disc using pre-formatted guide tracks having an interrupted signal format'19904,864,423'Information recording disc and information signal recording apparatus therefor'19894,849,954'Disc attitude variation detecting apparatus'19894,841,504'Method and apparatus for recording an information signal on a rotary recording medium'19894,827,339'Moving picture signal transmission system'19894,805,164'Disc inclination detecting apparatus'19894,803,677'Rotary recording medium having a guide track and recording and reproducing apparatus therefor'19894,802,159'Information recording disc and information signal recording apparatus therefor'19894,757,488'Rotation control apparatus for constant linear velocity system information recording disc'19884,754,339'Information recording disc pre-recorded with address and pseudo address signals'19884,695,882'Movement estimation system for video signals using a recursive gradient method'19874,672,442'Frame rate conversion system in television signal'19874,639,778'Embedding quantization system for vector signals'19874,536,745'Sampling frequency conversion device'19854,224,642'PCM Recording and reproducing method providing for dropout compensation'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–1998Patents assigned to TEAC CORP (17)· patent assignee history
1980–1998Based in Tokyo, JP· patent location history
1985–1992Patents assigned to KOKUSAI DENSHIN DENWA CO LTD (6)· patent assignee history
1985–1989Based in Tanashi, JP· patent location history
1996–2013Patents assigned to TEXAS INSTRUMENTS INC (22)· patent assignee history
1996–2013Based in Ibaraki, JP· patent location history
1998–2005Patents assigned to UNISYS CORP (2)· patent assignee history
1998–2007Based in Tsukuba, JP· patent location history
1998–2009Based in Mission Viejo, CA, US· patent location history
2009Patents assigned to ALPINE ELECTRONICS INC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TEXAS INSTRUMENTS INC221996–2013
TEAC CORP171980–1998
KOKUSAI DENSHIN DENWA CO LTD61985–1992
UNISYS CORP21998–2005
ALPINE ELECTRONICS INC12009
Locations
LocationPatentsSpan
Tokyo, JP221980–1998
Tsukuba, JP111998–2007
Ibaraki, JP101996–2013
Mission Viejo, California, US31998–2009
Tanashi, JP21985–1989