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 patentsUS6427065B1Jul 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 patentsUS6275023B1Aug 14, 2001
Semiconductor device tester and method for testing semiconductor device
HITACHI ELECTR ENG74 citations93
US6448800B1Sep 10, 2002
Load current output circuit for electronic device and IC tester using the same load current output circuit
HITACHI ELECTR ENG11 citations72
US6424201B2Jul 23, 2002
Diode element circuit and switch circuit using the same
HITACHI ELECTR ENG4 citations61
TOSHIBA KK
3 patentsUS7489330B2Feb 10, 2009
Scanning type image pick-up apparatus and a scanning type laser beam receive apparatus
TOSHIBA KK11 citations80
US7289153B2Oct 30, 2007
Scanning type image pick-up apparatus and a scanning type laser beam receive apparatus
TOSHIBA KK3 citations59
US6449012B1Sep 10, 2002
Scanning type image pick-up apparatus and a scanning type laser beam receive apparatus
TOSHIBA KK0 citations48
MAXIM INTEGRATED PRODUCTS
3 patentsUS7003007B2Feb 21, 2006
System and method for using an output transformer for packaged laser diode drivers
MAXIM INTEGRATED PRODUCTS9 citations72
US6931040B2Aug 16, 2005
System and method for using an output transformer for laser diode drivers
MAXIM INTEGRATED PRODUCTS9 citations72
US7411987B2Aug 12, 2008
System and method for using an output transformer for laser diode drivers
MAXIM INTEGRATED PRODUCTS4 citations61
NIPPON SHEET GLASS CO LTD
2 patentsMITSUBISHI HEAVY IND LTD
2 patentsCATERPILLAR SARL
2 patentsSAMSUNG ELECTRONICS CO LTD
2 patentsUS10855497B2Dec 1, 2020
Semiconductor device including a high-speed receiver being capable of adjusting timing skew for multi-level signal and testing equipment including the receiver
SAMSUNG ELECTRONICS CO LTD1 citations53
US9880270B2Jan 30, 2018
Test device and imaging device including the same
SAMSUNG ELECTRONICS CO LTD0 citations41