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Inventor

Masahiro Nakata

Inventor
Tokyo, JP

Overview

73→
Patents
1977–2020
Patent span
Physics
Primary field (CPC G)

Patents· 73 as inventor

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

G02Bprimary
G02BOptical elements, systems or apparatus24%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them9%
H04NPictorial communication, e.g. television6%
Y10TTechnical subjects covered by former us classification6%
B23KSoldering or unsoldering5%
G11BInformation storage based on relative movement between record carrier and transducer5%
B21DWorking or processing of sheet metal or metal tubes, rods or profiles without essentially removing material4%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%
B29CShaping or joining of plastics3%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form3%
PatentTitleYear
10,799,930Press forming method and press forming apparatus202010,787,142Supporting structure for underrun protector202010,759,929Biaxially stretched polypropylene film for capacitors202010,493,512Press-molded article manufacturing method and press apparatus201910,471,493Pressed component manufacturing method, press, and press line201910,456,865Welding method and welding structure201910,431,380Biaxially stretched polypropylene film for capacitor201910,294,356Biaxially stretched polypropylene film for capacitors201910,137,530Laser weld method and weld structure201810,093,792Biaxially stretched polypropylene film for capacitors201810,035,324Formed member and manufacturing method thereof201810,016,841Laser surface treatment method and laser surface treatment apparatus with radiating the surface to be treated along an acute angle20189,718,113'Press-formed product'20179,636,781'Laser welding method'20178,064,306'Optical disc device and hybrid optical disc'20117,927,043'Rockbolts made of steel pipes'20117,792,002'Optical disc device'20107,755,994'Optical disc device and hybrid optical disc'20107,719,953'Optical recording medium, optical recording method, optical reproducing method, optical recording apparatus, and optical reproducing apparatus'20107,589,764'Focus detection device including reduction of fluctuations due to flickering light'20097,559,998'Hot forming method and a hot formed member'20097,512,332'Camera with superimpose indication function'20097,496,290'Multipoint autofocus system and camera having multipoint autofocus system'20097,493,034'Focus detection system'20097,460,779'Focus detection system'20087,454,135'Camera system incorporating a seamless lens-drive switching mechanism'20087,315,009'Material for welding and welded article'20087,150,391'Material for welding and welded article'20067,049,571'Focus detection device'20066,987,538'Multipoint autofocus system'20066,937,818'Focus detection device'20056,922,526'Focus detection device'20056,871,018'Focus detection device'20056,817,306'Thread cutting device for sewing machine'20046,727,950'Focusing device for digital camera including contrast calculator'20046,657,669'Focus condition sensing device'20036,614,476'Arrangement of plural imaging devices'20036,498,900'Automatic focusing apparatus'20026,463,214'Multi-point autofocus system'20026,198,506'Multipoint autofocus system having a line sensor'20016,178,295'Lens movement control device'20015,915,133'Camera with a photographic mode automatic selecting apparatus'19995,896,174'Control system for inhibiting a calculating system in an automatic focusing device'19995,886,340'Multiple step automatic focusing apparatus for a surveying instrument'19995,878,289'Camera having automatic focusing system'19995,872,661'Automatic focusing apparatus for a telephotographic system'19995,870,756'Interchangeable storage medium containing program for processing data files thereupon to match a data file format to a computer system'19995,856,664'Automatic focusing apparatus for detecting and correcting focus state of image optical system'19995,856,663'Focus detecting apparatus with virtual centering of line sensor'19995,844,231'Automatic focusing apparatus with plural light receiving devices for a surveying instrument'19985,845,155'Multipoint autofocusing system'19985,812,888'Motor driven zoom camera'19985,754,894'Motor driven zoom camera'19985,739,991'Composite thin film head having magnetoresistive and inductive head portions with nonmagnetic thin film interposed between core and shield portions of core layer'19985,680,647'Motor driven zoom camera'19975,664,239'Automatic focusing apparatus'19975,654,789'Motor driven zoom camera'19975,640,225'Backlash compensation for automatic focusing apparatus'19975,612,761'Automatic focusing apparatus'19975,609,971'Thin film magnetic head'19975,510,941'Magneto-resistive type magnetic head with a shunt layer of molybdenum'19965,508,779'Auto-bracketing system'19965,498,944'Automatic focusing apparatus'19965,448,329'Focus detecting apparatus for determining whether an object is moving'19955,170,205'Eliminating camera-shake'19925,024,699'Leuco dyes and recording materials using the same'19915,021,818'Multi-area brightness measuring apparatus'19914,985,345'Recording material'19914,978,981'Exposure control device'19904,945,199'Electric discharge machining method and device'19904,925,828'Leuco dyes and recording materials using the same'19904,891,487'Electrode return control for electric spark machine'19904,041,800'Stroke length adjusting devices'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–2020Based in Tokyo, JP· patent location history
1990–2002Patents assigned to ASAHI OPTICAL CO LTD (25)· patent assignee history
1990–2020Based in Osaka, JP· patent location history
1996–2011Patents assigned to SANYO ELECTRIC CO (7)· patent assignee history
2001–2009Based in Saitama, JP· patent location history
2003–2006Patents assigned to PENTAX CORP (8)· patent assignee history
2006–2009Based in Nishinomiya, JP· patent location history
2008–2009Patents assigned to HOYA CORP (6)· patent assignee history
2010–2011Based in Ogaki, JP· patent location history
2017–2020Patents assigned to NIPPON STEEL & SUMITOMO METAL CORP (6)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ASAHI OPTICAL CO LTD251990–2002
PENTAX CORP82003–2006
SANYO ELECTRIC CO71996–2011
HOYA CORP62008–2009
NIPPON STEEL & SUMITOMO METAL CORP62017–2020
Locations
LocationPatentsSpan
Tokyo, JP311977–2020
Saitama, JP162001–2009
Osaka, JP61990–2020
Ogaki, JP32010–2011
Nishinomiya, JP32006–2009