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Inventor

Koichi Yanagisawa

Inventor
Ueda, JP

Overview

16→
Patents
1991–2021
Patent span
Physics
Primary field (CPC G)

Patents· 16 as inventor

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

G01Rprimary
G01RMeasuring electric variables21%
E21BEarth or rock drilling11%
G02BOptical elements, systems or apparatus7%
H01FMagnets7%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems7%
H03HImpedance networks, e.g. resonant circuits7%
E02DFoundations4%
F01NGas-flow silencers or exhaust apparatus for machines or engines in general4%
F02GHot gas or combustion-product positive-displacement engine plants4%
F03GSpring, weight, inertia or like motors4%
PatentTitleYear
10,935,719Optical waveguide having support member, optical waveguide mounting substrate and optical transceiver202110,928,598Optical waveguide mounting substrate and optical communication device202110,841,027Broadcast wave synchronization signal converting device202010,767,538Energy conversion device202010,012,677Voltage detecting apparatus20189,201,100'Voltage detecting apparatus and line voltage detecting apparatus'20158,803,506'Voltage detecting apparatus that detects voltage of an object'20148,222,886'Voltage detecting apparatus and line voltage detecting apparatus having a detection electrode disposed facing a detected object'20127,834,645'Variable capacitance circuit, voltage measuring apparatus, and power measuring apparatus'20107,466,145'Voltage measuring apparatus and power measuring apparatus'20087,454,725'Apparatus and computer readable medium having program for analyzing distributed constant in a transmission line'20087,355,493'Filter element'20087,148,768'Filter element'20065,896,926'Packer type groundwater sampling system and water sampling method'19995,767,400'Hydraulic test system mounted with borehole television set for simultaneous observation in front and lateral directions'19984,986,120'Low-water-pressure controlled hydrologic test method'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–1999Patents assigned to DORYOKURO KAKUNENRYO (3)· patent assignee history
1991–1998Patents assigned to TAISEI KISO SEKKEI CO LTD (2)· patent assignee history
1991–1998Based in Toki, JP· patent location history
2006–2018Patents assigned to HIOKI ELECTRIC WORKS (9)· patent assignee history
2006–2014Based in Ueda, JP· patent location history
2010–2021Based in Nagano, JP· patent location history
2012–2014Patents assigned to YANAGISAWA KOICHI (2)· patent assignee history
2020Based in Tokyo, JP· patent location history
2020Based in Nisshin, JP· patent location history
2021Patents assigned to SHINKO ELECTRIC IND CO (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HIOKI ELECTRIC WORKS92006–2018
DORYOKURO KAKUNENRYO31991–1999
SHINKO ELECTRIC IND CO22021
TAISEI KISO SEKKEI CO LTD21991–1998
YANAGISAWA KOICHIself22012–2014
Locations
LocationPatentsSpan
Ueda, JP62006–2014
Nagano, JP42010–2021
Toki, JP21991–1998
Tokyo, JP12020
Nisshin, JP12020