Inventor

Keiki Yamaguchi

Inventor

Tokyo, JP

Overview

20→

Patents

1981–1992

Patent span

Physics

Primary field (CPC G)

Patents· 20 as inventor

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

A61Bprimary

A61BDiagnosis22%

G01SRadio direction-finding15%

G01RMeasuring electric variables12%

G10KSound-producing devices10%

G01NInvestigating or analysing materials by determining their chemical or physical properties5%

G01TMeasurement of nuclear or x-radiation5%

A61HPhysical therapy apparatus, e.g. devices for locating or stimulating reflex points in the body2%

A61MDevices for introducing media into, or onto, the body2%

B06BMethods or apparatus for generating or transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency, e.g. for performing mechanical work in general2%

G01FMeasuring volume, volume flow, mass flow or liquid level2%

PatentTitleYear

5,168,877'Ultrasonic diagnostic apparatus'1992 5,058,176'Image diagnosis apparatus'1991 5,031,625'Received ultrasonic phase matching circuit'1991 4,777,535'Apparatus for recording CT images directly on a recording medium without using a CRT'1988 4,709,271'CRT multiformat camera'1987 4,700,136'NMR imaging apparatus'1987 4,684,889'NMR apparatus compensated for primary field changes'1987 4,663,592'NMR image forming apparatus'1987 4,631,710'Azimuth adaptive phased array sonar'1986 4,532,644'X-ray computerized tomograph'1985 4,501,278'Ultrasonic probe for puncture treatment'1985 4,491,734'X-ray detector and method of making same'1985 4,484,340'Multichannel current measuring apparatus for X-ray computerized tomograph'1984 4,475,553'Ultrasonic needle housing probe with continuous locator array'1984 4,463,608'Ultrasound imaging system'1984 4,445,379'Apparatus for receiving reflected ultrasonic waves in ultrasonography'1984 4,392,379'Ultrasonic diagnostic equipment'1983 4,385,255'Linear array ultrasonic transducer'1983 4,319,489'Ultrasonic diagnostic method and apparatus'1982 4,280,064'Signal isolator'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–1983Patents assigned to YOKOGAWA ELECTRIC WORKS LTD (4)· patent assignee history

1981–1985Based in Musashino, JP· patent location history

1984–1987Patents assigned to YOKOGAWA HOKUSHIN ELECTRIC (9)· patent assignee history

1984–1992Based in Tokyo, JP· patent location history

1986–1992Patents assigned to YOKOGAWA MEDICAL SYST (9)· patent assignee history

1987Patents assigned to YOKOGAWA ELECTRIC CORP (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
YOKOGAWA HOKUSHIN ELECTRIC	9	1984–1987
YOKOGAWA MEDICAL SYST	9	1986–1992
YOKOGAWA ELECTRIC WORKS LTD	4	1981–1983
YOKOGAWA ELECTRIC CORP	1	1987

Locations

Location	Patents	Span
Tokyo, JP	13	1984–1992
Musashino, JP	7	1981–1985