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Inventor

Takehiro Ohkawa

Inventor
Kunitachi, JP

Overview

6→
Patents
1997–2007
Patent span
Electricity
Primary field (CPC H)

Patents· 6 as inventor

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

G06Kprimary
G06KGraphical data reading36%
H01FMagnets18%
H05KPrinted circuits18%
G11CStatic stores9%
H01JElectric discharge tubes or discharge lamps9%
H01QAntennas, i.e. radio aerials9%
PatentTitleYear
7,212,124'Portable information device'20076,972,662'RFID (radio frequency identification) and IC card'20056,373,708'Contactless IC card'20026,121,623'Parallel radiation detector'20005,999,409'Contactless IC card'19995,594,680'Noise reduced contactless parallel data transfer device and method thereof'1997

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1997–2007Patents assigned to HITACHI LTD (5)· patent assignee history
1997Patents assigned to HITACHI MAXELL (1)· patent assignee history
1997–2002Based in Kunitachi, JP· patent location history
1999–2002Patents assigned to HITACHI CHEMICAL CO LTD (2)· patent assignee history
2005Patents assigned to RENESAS TECH CORP (1)· patent assignee history
2005–2007Based in Tachikawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD51997–2007
HITACHI CHEMICAL CO LTD21999–2002
HITACHI MAXELL11997
RENESAS TECH CORP12005
Locations
LocationPatentsSpan
Kunitachi, JP41997–2002
Tachikawa, JP22005–2007