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Inventor

Koichi Maruyama

Inventor
Tokyo, JP

Overview

138→
Patents
1976–2019
Patent span
Physics
Primary field (CPC G)

Patents· 138 as inventor

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

G02Bprimary
G02BOptical elements, systems or apparatus37%
G11BInformation storage based on relative movement between record carrier and transducer37%
G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices4%
H01JElectric discharge tubes or discharge lamps3%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them3%
F01PCooling of machines or engines in general2%
F16KValves2%
C03CChemical composition of glasses, glazes or vitreous enamels1%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h101%
Y10TTechnical subjects covered by former us classification1%
PatentTitleYear
10,513,966Refrigerant control valve device201910,514,103Refrigerant control valve apparatus201910,513,968Refrigerant control valve apparatus201910,072,556Refrigerant control valve apparatus20189,550,441'Clip for mounting component, and component-mounting structure'20179,494,156'Pump'20168,705,331'Optical element and objective lens through which a plurality of light beams having different design wavelengths pass'20148,627,239'Mask fabrication supporting method, mask blank providing method, and mask blank dealing system'20148,570,668'Imaging optical system and imaging apparatus'20138,196,070'Mask fabrication supporting method, mask blank providing method, and mask blank dealing system'20128,116,187'Design method of optical element and optical element through which a plurality of light beams having different design wavelengths pass'20128,072,694'Objective lens'20118,036,338'Method and device for simultaneous measurement of magnetostriction and magnetization'20118,011,352'Gas introducing structure of intake path'20117,975,677'Gas introducing structure of intake path'20117,920,444'Assembling method for optical system of optical pick-up'20117,872,958'Optical information recording/reproducing device, optical element for the same, and design method of the same'20117,839,752'Optical disc drive and objective lens for the same'20107,839,751'Objective lens and optical system for optical pick-up'20107,821,906'Objective lens for optical pick-up'20107,742,370'Objective lens and optical information read/write device'20107,738,345'Optical disc drive and objective lens for the same'20107,660,456'Mask fabrication supporting method, mask blank providing method, and mask blank dealing system'20107,468,942'Optical pickup, optical element, and information reproducing apparatus configured for use with any of plural types of recording media'20087,433,291'Objective lens'20087,430,159'Optical pick-up and objective lens for use with different types of optical discs'20087,414,948'Objective lens'20087,339,876'Optical system of optical pick-up'20087,280,276'Objective lens'20077,239,598'Objective lens for optical pick-up'20077,224,662'Objective lens for optical pickup'20077,158,468'Optical system for optical head'20077,106,525'Objective lens for optical pick-up'20067,054,254'High NA objective lens for optical pick-up'20067,038,862'Objective lens for optical pick-up'20067,035,193'Objective lens for optical disc'20066,982,838'Objective lens for optical pick-up'20066,900,949'Optical system of optical pick-up'20056,898,024'Optical system for optical pickup employing coma compensating element'20056,873,590'Objective lens for optical pick-up'20056,822,800'Objective lens for optical pickup'20046,819,504'High NA objective lens for optical pick-up'20046,807,018'Objective lens for optical pick-up'20046,807,019'Objective lens having diffractive structure for optical pick-up'20046,791,932'Optical system of optical pick-up'20046,791,934'Objective lens optical system, optical head and optical information reproduction apparatus'20046,785,215'Astigmatic objective lens for optical head'20046,785,203'Optical lens for optical disc drive with aberration suppression for recording/reproducing for a plurality of optical disc types'20046,781,764'Objective lens for optical pick-up'20046,775,064'Objective lens for optical pick-up'20046,760,295'Optical pick-up'20046,741,402'Objective lens for optical head'20046,741,539'Optical system for optical head'20046,667,943'Optical disc apparatus'20036,654,184'Method for designing diffractive lens'20036,624,942'Objective lens for optical pick-up'20036,624,941'Diffraction optical element'20036,597,401'Image reading system with flare compensation'20036,594,222'Objective lens for optical pick-up'20036,560,034'Beam shaping optical system'20036,545,807'Refractive-diffractive hybrid lens'20036,487,161'Objective lens and optical head for optical disc drive'20026,480,344'Objective lens for optical pick-up'20026,477,129'Optical disc drive'20026,473,387'Optical disc apparatus'20026,357,811'Coupling structure of threaded member and synthetic resin part for vehicle'20026,344,935'Optical system of optical pick-up'20026,282,031'Beam shaping optical system'20016,226,123'Optical system for observing equipment having image-vibration compensation system'20016,221,561'Diffusion plate and method for manufacturing master die thereof'20016,191,889'Objective lens for optical pick-up'20016,130,785'Eyepiece lens system'20006,118,597'Chromatic aberration correcting element and its application'20006,118,594'Objective lens for optical pick-up'20006,115,175'UV image forming optical system'20006,101,035'Triplet lens system with diffractive lens features'20006,038,089'Beam shaping optical system'20005,991,102'Beam protecting device'19995,978,140'Method for designing diffractive lenses'19995,969,862'Chromatic aberration correcting element and its application'19995,965,327'Method for manufacturing a master die for a diffusion plate and diffusion manufactured by said method'19995,930,032'UV image forming optical system and lens for UV radiation'19995,914,822'Chromatic aberration correcting element and its application'19995,883,744'Chromatic aberration correcting element and its application'19995,838,496'Diffractive multi-focal objective lens'19985,838,497'Chromatic aberration correction element and its application'19985,825,555'Beam projecting apparatus'19985,796,520'Chromatic aberration correcting element and its application'19985,768,036'Beam receiving position adjusting device'19985,745,296'Multibeam recording device'19985,733,710'Method for manufacturing a master die for a diffusion plate and diffusion plate manufactured by said method'19985,701,205'Shiftable lens system'19975,664,251'Method of making an aperture plate for a multibeam pattern drawing apparatus'19975,657,171'Optical system of optical information recording/reproducing apparatus'19975,657,168'Optical system of optical information recording/ reproducing apparatus'19975,644,437'Optical system of optical information recording/reproducing apparatus'19975,642,223'Tilting lens system'19975,638,221'Optical system of optical information recording/reproducing apparatus'19975,633,852'Optical data recording and reproducing apparatus including chromatic aberration correction'19975,629,799'Chromatic aberration correcting element and its application'19975,600,494'Objective lens system of an optical disk device'19975,559,639'Beam receiving position adjusting device'19965,519,538'Zoom lens for preventing image from being blurred'19965,500,767'Objective lens and method of measuring its performance'19965,491,587'Collimating lens for optical system using semiconductor laser'19965,477,386'Optical system for optical disc apparatus including anamorphic prisms'19955,471,456'Optical medium recording apparatus with a rotatable optical beam deflector'19955,461,513'Image stabilizing apparatus'19955,448,412'Telephoto zoom lens system'19955,434,835'Optical disk apparatus'19955,402,269'Compound prism'19955,373,437'Device for and method of reducing cross talk in optical disk device'19945,343,332'Apparatus for adjusting optical axis including a beam shaping prism'19945,341,246'Apparatus for adjusting an optical axis including plates on opposite sides of a beam shaping prism'19945,321,550'Optical system of optical information recording/reproducing apparatus'19945,297,114'Magneto-optic recording/reproduction apparatus for minimizing variation in focusing error signals caused by variation in optical source wavelength'19945,280,464'Optical disk apparatus having a focusing error correcting system'19945,280,387'Image stabilizing apparatus'19945,278,401'Optical disc apparatus having five light receiving areas for detecting focus error and tracking error'19945,237,457'Apparatus for adjusting an optical axis including a laser beam source and a beam shaping prism'19935,223,983'Compound prism including interfaces with curvatures of the order of a laser wave length'19935,214,537'Chromatic aberration correcting objective lens system for information recording/reproducing apparatus'19935,173,809'Objective lens system of optical information recording/reproducing apparatus'19925,121,978'Image blur compensating telephotographic lens'19925,087,990'Collimator lens of erasable and re-recordable magneto-optical disk system'19925,039,211'Zoom lens capable of image blur compensation'19914,966,449'Telephoto lens system'19904,948,233'Beam shaping optical system'19904,942,414'Front conversion adapter for lens shutter type of zoom lens camera'19904,848,883'Telephoto zoom lens system having four lens groups'19894,743,101'Rear-attachment lens system'19884,229,675'Color picture tube with internal funnel shaped magnetic shield'19804,145,677'Color misalignment correction device for color picture tube'19794,142,131'Color picture tube'19794,052,122'Correcting lenses utilized in the manufacture of fluorescent screen of color picture tubes'19774,052,123'Correcting lenses utilized in the manufacture of fluorescent screen of color picture tubes'19773,982,252'Light exposure apparatus for manufacturing color picture tubes'19763,936,151'Correction lenses utilized to form fluorescent screens of colour picture tubes'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–2005Patents assigned to HITACHI LTD (12)· patent assignee history
1976–1977Based in Mobara, JP· patent location history
1988–2002Patents assigned to ASAHI OPTICAL CO LTD (67)· patent assignee history
1988–2014Based in Tokyo, JP· patent location history
2000–2004Based in Saitama, JP· patent location history
2003–2008Patents assigned to PENTAX CORP (33)· patent assignee history
2008–2014Patents assigned to HOYA CORP (18)· patent assignee history
2010–2014Based in Nirasaki, JP· patent location history
2011–2017Patents assigned to MARUYAMA KOICHI (8)· patent assignee history
2018–2019Based in Anjo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ASAHI OPTICAL CO LTD671988–2002
PENTAX CORP332003–2008
HOYA CORP182008–2014
HITACHI LTD121976–2005
MARUYAMA KOICHIself82011–2017
Locations
LocationPatentsSpan
Tokyo, JP1091988–2014
Saitama, JP92000–2004
Mobara, JP41976–1977
Anjo, JP32018–2019
Nirasaki, JP32010–2014