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Inventor

Masaki Ichikawa

Inventor
Tokyo, JP

Overview

13→
Patents
1989–2019
Patent span
Electricity
Primary field (CPC H)

Patents· 13 as inventor

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

H04Lprimary
H04LTransmission of digital information, e.g. telegraphic communication10%
C07CAcyclic or carbocyclic compounds6%
G11CStatic stores6%
H04NPictorial communication, e.g. television6%
H04WWireless communication networks6%
A61FFilters implantable into blood vessels3%
A61HPhysical therapy apparatus, e.g. devices for locating or stimulating reflex points in the body3%
A61KPreparations for medical, dental or toiletry purposes3%
A61NElectrotherapy3%
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations3%
PatentTitleYear
10,447,893Image forming apparatus, computer-readable storage medium, and image forming method with position acquisition and correction201910,241,436Image forming apparatus and laser light detecting method201910,057,756Terminal detection method and communication device20189,210,014'Cross-polar interference cancellation system, wireless station device, wireless communication method'20158,744,503'Wireless communication device, wireless communication system, and wireless communication method'20148,148,970'Reference current generating circuit'20127,646,222'Semiconductor device for generating power on reset signal'20107,245,530'Semiconductor memory device with MOS transistors, each including floating gate and control gate, and memory card including the same'20076,886,599'Gas supply unit'20056,395,932'1,2-diphenyl-2-propen-1-one derivatives'20026,329,547'Vinylbenzene derivatives'20015,030,354'Separation agent for optical isomers'19914,844,905'Granule remaining in stomach'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–1991Patents assigned to EISAI CO LTD (2)· patent assignee history
2001–2002Patents assigned to SANTEN PHARMACEUTICAL CO LTD (2)· patent assignee history
2001–2002Based in Ikoma, JP· patent location history
2007–2019Patents assigned to TOSHIBA KK (5)· patent assignee history
2007–2010Based in Fujisawa, JP· patent location history
2012–2015Patents assigned to ICHIKAWA MASAKI (3)· patent assignee history
2014–2015Patents assigned to NEC CORP (2)· patent assignee history
2014–2015Based in Tokyo, JP· patent location history
2019Based in Shizuoka, JP· patent location history
2019Based in Shizuoka-shi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TOSHIBA KK52007–2019
ICHIKAWA MASAKIself32012–2015
EISAI CO LTD21989–1991
NEC CORP22014–2015
SANTEN PHARMACEUTICAL CO LTD22001–2002
Locations
LocationPatentsSpan
Tokyo, JP22014–2015
Fujisawa, JP22007–2010
Ikoma, JP22001–2002
Shizuoka, JP12019
Shizuoka-shi, JP12019