P

Inventor

HAYASHI YOSHIHIKO

JP43 patents
⚠️ This page may combine multiple inventors who share the name “HAYASHI YOSHIHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HITACHI LTD

18 patents
US6427065B1Jul 30, 2002

Power transmission system, IC card and information communication system using IC card

HITACHI LTD257 citations99
US6321067B1Nov 20, 2001

Power transmission system IC card and information communication system using IC card

HITACHI LTD217 citations99
US6176433B1Jan 23, 2001

Reader/writer having coil arrangements to restrain electromagnetic field intensity at a distance

HITACHI LTD262 citations98
US6194993B1Feb 27, 2001

Reader and/or writer apparatus, power feeding system, and communication system

HITACHI LTD89 citations97
US6608550B2Aug 19, 2003

Reader and/or writer apparatus, power feeding system, and communication system

HITACHI LTD34 citations92
US4788684ANov 29, 1988

Memory test apparatus

HITACHI LTD50 citations92
US5438259AAug 1, 1995

Digital circuitry apparatus

HITACHI LTD35 citations90
US6164532ADec 26, 2000

Power transmission system, power transmission/communication system and reader and/or writer

HITACHI LTD17 citations84
US5153883AOct 6, 1992

Distributed timing signal generator

HITACHI LTD21 citations82
US6625554B2Sep 23, 2003

Method and apparatus for determining a magnetic field

HITACHI LTD10 citations74
US5949823ASep 7, 1999

Data communication system and radio IC card system

HITACHI LTD11 citations74
US4651334AMar 17, 1987

Variable-ratio frequency divider

HITACHI LTD10 citations74
US6700369B1Mar 2, 2004

Testing apparatus of magnetic recording medium or magnetic head including a plurality of analog-to-digital converters which convert reproduced testing data into digital data

HITACHI LTD11 citations72
US6606177B1Aug 12, 2003

Driver circuit and optical-transmission module

HITACHI LTD9 citations72
US5541553AJul 30, 1996

Amplifier with a function for switching on and off the output signal

HITACHI LTD15 citations72
US5406198AApr 11, 1995

Digital circuitry apparatus

HITACHI LTD14 citations71
US6801050B2Oct 5, 2004

Driver circuit integrated with load current output circuit, pin electronics and IC tester having thereof

HITACHI LTD11 citations68
US4855970AAug 8, 1989

Time interval measurement apparatus

HITACHI LTD2 citations62

HITACHI ELECTR ENG

3 patents

TOSHIBA KK

3 patents

MAXIM INTEGRATED PRODUCTS

3 patents

NIPPON SHEET GLASS CO LTD

2 patents

MITSUBISHI HEAVY IND LTD

2 patents

CATERPILLAR SARL

2 patents

SAMSUNG ELECTRONICS CO LTD

2 patents

JAPAN STEEL WORKS LTD

2 patents

HITACHI HIGH TECH ELECT ENG CO

1 patent

NAKA TAKEHIRO

1 patent

HIDAKA YASUYOSHI

1 patent

OPNEXT JAPAN INC

1 patent

IBIDEN CO LTD

1 patent

FUJIOKA HIDEYASU

1 patent