Takehiro Ohkawa

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Tachikawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Portable information device
- Patent number 7,212,124
- Issue date May 1, 2007
- Hitachi, Ltd.
- Takehiro Ohkawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
RFID (radio frequency identification) and IC card
- Patent number 6,972,662
- Issue date Dec 6, 2005
- Renesas Technology Corp.
- Takehiro Ohkawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Contactless IC card
- Patent number 6,373,708
- Issue date Apr 16, 2002
- Hitachi, Ltd.
- Kimiaki Ando
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Parallel radiation detector
- Patent number 6,121,623
- Issue date Sep 19, 2000
- Hitachi, Ltd.
- Isao Ochiai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Contactless IC card
- Patent number 5,999,409
- Issue date Dec 7, 1999
- Hitachi, Ltd.
- Kimiaki Ando
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Noise reduced contactless parallel data transfer device and method...
- Patent number 5,594,680
- Issue date Jan 14, 1997
- Hitachi, Ltd.
- Masatoshi Ohtake
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
RFID
- Publication number 20050122211
- Publication date Jun 9, 2005
- Hitachi, Ltd.
- Hiroshi Yoshigi
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Communication system
- Publication number 20040233043
- Publication date Nov 25, 2004
- Hitachi, Ltd.
- Yoshiaki Yazawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Portable information device
- Publication number 20040140896
- Publication date Jul 22, 2004
- Takehiro Ohkawa
- G06 - COMPUTING CALCULATING COUNTING