Inventor
TAKASUGI WASAO
JP28 patents
⚠️ This page may combine multiple inventors who share the name “TAKASUGI WASAO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
20 patentsUS4866692ASep 12, 1989
Method and apparatus for information recording and reproduction of a pit-shape-forming optical recording type
HITACHI LTD153 citations99
US5295485AMar 22, 1994
Ultrasonic diagnostic system
HITACHI LTD225 citations98
US4646103AFeb 24, 1987
Optical recording method
HITACHI LTD63 citations96
US4835759AMay 30, 1989
Method and apparatus for compensating variation of read data in an optical data storage
HITACHI LTD43 citations93
US4785442ANov 15, 1988
Light spot position control system and method by sampling servo
HITACHI LTD38 citations92
US4735211AApr 5, 1988
Ultrasonic measurement apparatus
HITACHI LTD32 citations92
US4564929AJan 14, 1986
Information recording and reproducing apparatus with tracking control by sampling
HITACHI LTD30 citations92
US4507767AMar 26, 1985
Control circuit for controlling light source in optical disc device
HITACHI LTD50 citations92
US4450547AMay 22, 1984
Focal position detecting optical apparatus
HITACHI LTD53 citations92
US4392219AJul 5, 1983
Method and device for recording and reproducing tracking information
HITACHI LTD33 citations92
US4748611AMay 31, 1988
Information recording medium and method for reproducing the same
HITACHI LTD29 citations89
US4949325AAug 14, 1990
Method and associated apparatus and medium for optical recording and reproducing information
HITACHI LTD22 citations82
US4817066AMar 28, 1989
Transmitter/receiver for ultrasonic diagnostic system
HITACHI LTD22 citations82
US4282551AAug 4, 1981
PCM Recording and reproducing apparatus
HITACHI LTD23 citations82
US4872152AOct 3, 1989
Light spot position control system and method by sampled servo
HITACHI LTD18 citations74
US4258330AMar 24, 1981
Differential current amplifier
HITACHI LTD7 citations74
US4177394ADec 4, 1979
Comparator circuit having multi-functions
HITACHI LTD11 citations74
USRE35435EJan 28, 1997
Method and apparatus for information recording and reproduction of a pit-shape-forming optical recording type
HITACHI LTD2 citations63
US4847822AJul 11, 1989
Optical information recording and reproducing apparatus with tracking control by sampling
HITACHI LTD4 citations63
US4680498AJul 14, 1987
Input circuit in ultrasonic apparatus
HITACHI LTD3 citations63
HITACHI MAXELL
8 patentsUS6837438B1Jan 4, 2005
Non-contact information medium and communication system utilizing the same
HITACHI MAXELL292 citations99
US6344824B1Feb 5, 2002
Noncontact communication semiconductor device
HITACHI MAXELL109 citations98
US5574273ANov 12, 1996
Non-contact system parallel data transfer system
HITACHI MAXELL113 citations97
US6482495B1Nov 19, 2002
Information carrier and process for production thereof
HITACHI MAXELL71 citations94
US5418353AMay 23, 1995
Non-contact, electromagnetically coupled transmission and receiving system for IC cards
HITACHI MAXELL87 citations94
US5856662AJan 5, 1999
Information carrier and process for producing same
HITACHI MAXELL71 citations93
US6926794B2Aug 9, 2005
Information carrier and process for production thereof
HITACHI MAXELL32 citations91
US6786407B1Sep 7, 2004
Reader and system for noncontact type information storage medium
HITACHI MAXELL17 citations84