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Inventor

Takuma Yanagisawa

Inventor
Tsurugashima, JP

Overview

34→
Patents
1994–2020
Patent span
Physics
Primary field (CPC G)

Patents· 34 as inventor

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

G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer71%
G02BOptical elements, systems or apparatus7%
H04NPictorial communication, e.g. television7%
B60KArrangement or mounting of propulsion units or of transmissions in vehicles2%
G01CMeasuring distances, levels or bearings2%
G08GTraffic control systems2%
G09BEducational or demonstration appliances2%
G09GArrangements or circuits for control of indicating devices using static means to present variable information2%
Y10TTechnical subjects covered by former us classification2%
PatentTitleYear
10,812,715Imaging apparatus and method of controlling imaging apparatus202010,122,930Display control apparatus and control method thereof20189,891,433'Virtual image generation device and head-up display'20188,475,902'Optical recording medium'20138,238,220'Pickup device'20128,004,951'Pickup device'20117,969,836'Optical pickup apparatus'20117,907,200'Seamless image viewing system and method'20117,903,048'Information display apparatus and navigation apparatus'20117,835,250'Optical pickup device and information recording/reproduction device'20107,835,237'Optical pickup device and information recording/reproducing apparatus'20107,821,899'Optical pickup device'20107,206,277'Optical pickup device and focal error detecting device therefor and wave aberration and focal error detecting device therefor'20077,200,077'Tilt angle detection device and method utilizing pattern identification'20077,190,664'High density optical recording medium and method for reproducing thereof'20077,190,642'Focus servo device'20077,151,736'Objective lens and optical pickup device'20067,142,498'Recorded information reproducing apparatus'20067,092,341'Data recording method and data recording medium'20066,970,406'Information playback apparatus, signal processing apparatus, and information playback method for detecting and canceling crosstalk'20056,865,144'Optical pickup apparatus and tilt amount detecting method'20056,801,491'Focus error detecting apparatus of optical pickup with a light separating and astigmatism generation optical element and detection method thereof'20046,590,857'Optical disk'20036,580,676'Recording information reproducing apparatus with crosstalk canceler'20036,563,773'Tracking control apparatus'20036,333,906'Optical pickup and information reproducing apparatus'20016,124,988'Objective lens'20005,856,959'Method for generating a focus error signal due to astigmatism and optical pickup device using the same'19995,850,081'Method for generating a focus error signal due to astigmatism and optical pickup device using the same'19985,615,206'Optical disk'19975,546,372'Information detection light intensity control apparatus in optical disc recorded-information reproducing apparatus'19965,455,817'Second harmonics generating optical recording layer'19955,381,391'Optical recording medium having a third non-linear optical reflection film'19955,365,052'Optical information reading apparatus with controlled numerical aperture relationship between focusing and receiving optical systems'1994

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1994–2003Patents assigned to PIONEER ELECTRONIC CORP (9)· patent assignee history
1994–2012Based in Tsurugashima, JP· patent location history
2000–2006Based in Saitama, JP· patent location history
2001–2018Patents assigned to PIONEER CORP (22)· patent assignee history
2012–2013Patents assigned to YANAGISAWA TAKUMA (2)· patent assignee history
2013Patents assigned to HIGUCHI TAKANOBU (1)· patent assignee history
2013Based in Kawasaki, JP· patent location history
2018–2020Patents assigned to CANON KK (2)· patent assignee history
2018–2020Based in Tokyo, JP· patent location history
2018Based in Kanagawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
PIONEER CORP222001–2018
PIONEER ELECTRONIC CORP91994–2003
CANON KK22018–2020
YANAGISAWA TAKUMAself22012–2013
HIGUCHI TAKANOBU12013
Locations
LocationPatentsSpan
Tsurugashima, JP271994–2012
Tokyo, JP22018–2020
Saitama, JP22000–2006
Kanagawa, JP12018
Kawasaki, JP12013