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Inventor

Yasuaki Ishikawa

Inventor
Tokyo, JP

Overview

20→
Patents
1980–2021
Patent span
Electricity
Primary field (CPC H)

Patents· 20 as inventor

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

G02Bprimary
G02BOptical elements, systems or apparatus12%
H04WWireless communication networks12%
H10FInorganic semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation9%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution9%
Y02PClimate change mitigation technologies in the production or processing of goods9%
E21DShafts6%
H04BTransmission6%
B01DSeparation3%
C07KPeptides3%
C12NMicroorganisms or enzymes3%
PatentTitleYear
11,119,330Reticle, reticle unit, rifle scope, and optical apparatus20219,187,570'Fusion protein'20158,989,076'Mobile communication system and mobile communication method'20158,891,433'Mobile communication system and operation method in mobile communication'20148,450,139'Method for manufacturing photoelectric conversion device'20138,138,499'Stacked photoelectric conversion device'20127,915,612'Photoelectric conversion device and method of producing the same'20117,782,819'Mobile communication system, radio base station, operation control method and program thereof'20107,263,081'Handover process free of short-break and packet loss in CDMA mobile communication system on IP network'20077,239,187'Reset circuit and digital communication apparatus'20076,747,493'Power-on reset circuit'20046,653,874'Clock producing circuit capable of suppressing phase shift at a time of change from active clock to standby clock'2003D0475758'Reticle pattern for a gun scope'20036,574,056'Eye cup moving mechanism of optical device'20036,142,577'Hydraulic muck handling system for tunnel boring machine'20005,777,785'Binoculars'19985,719,712'Clicking device having a rotary member with teeth engageable with a plurality of fixed projections'19984,735,523'Vibratory compaction working machine'19884,448,269'Cutter head for pit-boring machine'19844,187,085'Treating facility for sintering waste gas'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984–2000Patents assigned to HITACHI CONSTRUCTION MACHINERY (3)· patent assignee history
1988–2000Based in Ibaraki, JP· patent location history
1998–2021Patents assigned to NIKON CORP (5)· patent assignee history
1998Based in Sagamihara, JP· patent location history
2003–2015Patents assigned to NEC CORP (7)· patent assignee history
2003–2021Based in Tokyo, JP· patent location history
2011–2013Patents assigned to SHARP KK (3)· patent assignee history
2012–2015Patents assigned to ISHIKAWA YASUAKI (4)· patent assignee history
2012–2013Based in Osaka, JP· patent location history
2015Based in Ikoma, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NEC CORP72003–2015
NIKON CORP51998–2021
ISHIKAWA YASUAKIself42012–2015
HITACHI CONSTRUCTION MACHINERY31984–2000
SHARP KK32011–2013
Locations
LocationPatentsSpan
Tokyo, JP82003–2021
Osaka, JP22012–2013
Ibaraki, JP21988–2000
Sagamihara, JP21998
Ikoma, JP12015