Inventor

Wasao Takasugi

Inventor

Higashiyamato, JP

Overview

28→

Patents

1979–2005

Patent span

Physics

Primary field (CPC G)

Patents· 28 as inventor

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

G11Bprimary

G11BInformation storage based on relative movement between record carrier and transducer35%

G06KGraphical data reading18%

G01SRadio direction-finding8%

A61BDiagnosis5%

H03KPulse technique5%

H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h105%

Y10TTechnical subjects covered by former us classification5%

G01HMeasurement of mechanical vibrations or ultrasonic, sonic or infrasonic waves3%

G02BOptical elements, systems or apparatus3%

G16HHealthcare informatics, i.e. information and communication technology [ict] specially adapted for the handling or processing of medical or healthcare data3%

PatentTitleYear

6,926,794'Information carrier and process for production thereof'2005 6,837,438'Non-contact information medium and communication system utilizing the same'2005 6,786,407'Reader and system for noncontact type information storage medium'2004 6,482,495'Information carrier and process for production thereof'2002 6,344,824'Noncontact communication semiconductor device'2002 5,856,662'Information carrier and process for producing same'1999 RE035435'Method and apparatus for information recording and reproduction of a pit-shape-forming optical recording type'1997 5,574,273'Non-contact system parallel data transfer system'1996 5,418,353'Non-contact, electromagnetically coupled transmission and receiving system for IC cards'1995 5,295,485'Ultrasonic diagnostic system'1994 4,949,325'Method and associated apparatus and medium for optical recording and reproducing information'1990 4,872,152'Light spot position control system and method by sampled servo'1989 4,866,692'Method and apparatus for information recording and reproduction of a pit-shape-forming optical recording type'1989 4,847,822'Optical information recording and reproducing apparatus with tracking control by sampling'1989 4,835,759'Method and apparatus for compensating variation of read data in an optical data storage'1989 4,817,066'Transmitter/receiver for ultrasonic diagnostic system'1989 4,785,442'Light spot position control system and method by sampling servo'1988 4,748,611'Information recording medium and method for reproducing the same'1988 4,735,211'Ultrasonic measurement apparatus'1988 4,680,498'Input circuit in ultrasonic apparatus'1987 4,646,103'Optical recording method'1987 4,564,929'Information recording and reproducing apparatus with tracking control by sampling'1986 4,507,767'Control circuit for controlling light source in optical disc device'1985 4,450,547'Focal position detecting optical apparatus'1984 4,392,219'Method and device for recording and reproducing tracking information'1983 4,282,551'PCM Recording and reproducing apparatus'1981 4,258,330'Differential current amplifier'1981 4,177,394'Comparator circuit having multi-functions'1979

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1979–1997Patents assigned to HITACHI LTD (20)· patent assignee history

1979–2005Based in Higashiyamato, JP· patent location history

1987–1989Patents assigned to HITACHI MEDICAL CORP (2)· patent assignee history

1995–2005Patents assigned to HITACHI MAXELL (8)· patent assignee history

1995Patents assigned to NTT DATA TSUSHIN KK (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	20	1979–1997
HITACHI MAXELL	8	1995–2005
HITACHI MEDICAL CORP	2	1987–1989
NTT DATA TSUSHIN KK	1	1995

Locations

Location	Patents	Span
Higashiyamato, JP	28	1979–2005