Inventor

Kenichi Asakawa

Inventor

Tokyo, JP

Overview

27→

Patents

1978–2017

Patent span

Electricity

Primary field (CPC H)

Patents· 27 as inventor

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

H04Bprimary

H04BTransmission11%

C23CCoating metallic material9%

G01VGeophysics9%

H02GInstallation of electric cables or lines, or of combined optical and electric cables or lines9%

G02BOptical elements, systems or apparatus8%

G05DSystems for controlling or regulating non-electric variables6%

Y02ATechnologies for adaptation to climate change6%

Y10TTechnical subjects covered by former us classification6%

B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form4%

B60LPropulsion of electrically-propelled vehicles4%

PatentTitleYear

9,599,224'Shell of pressure-resistant container, pressure-resistant container, and exploratory apparatus'2017 9,403,584'Pressure-resistant container and exploration machine provided with the same'2016 7,539,413'Observation apparatus and observation system'2009 7,437,070'Submarine observation apparatus and submarine observation system'2008 7,276,811'Submarine power feeding system having submarine feeding cables and power feeding branching devices'2007 7,166,933'Submarine power feeding branching device for submarine power feeding system having submarine feeding cables arranged in mesh pattern'2007 7,102,257'Submarine cable power feeding system'2006 6,563,236'Feed line switching circuit and branching unit'2003 6,157,098'Feed line connection circuit and optical transmission system'2000 5,790,358'Feeding pass switching circuit'1998 5,764,061'Maritime apparatus for locating a buried submarine cable'1998 5,110,544'Stainless steel exhibiting excellent anticorrosion property for use in engine exhaust systems'1992 4,946,748'Highly anticorrosive coated steel sheet for fuel vessel and process for production thereof'1990 4,911,522'Core alignment system for optical fibers'1990 4,891,274'Hot-dip aluminum coated steel sheet having excellent corrosion resistance and heat resistance'1990 4,784,731'Chromate treatment of a metal coated steel sheet'1988 4,731,301'Tinned steel sheet having a high degree of corrosion resistance and a method of producing the same'1988 4,678,371'Burying device for submarine cables and method for guiding the same'1987 4,641,915'Rotary joint for optical fibers'1987 4,637,686'Optical fiber with light reflecting particles dispersed through buffer layers to dissipate leaky cladding modes'1987 4,625,172'Apparatus for supplying AC current to an underwater cable'1986 4,584,211'Continuous hot dip aluminum coating method'1986 4,544,233'Underwater optical fiber connector'1985 4,540,942'Alternating current induction method using an annular magnetic coupling body for detecting the position of a buried submarine cable'1985 4,492,492'Guiding method for cable burying device and a device therefor'1985 4,384,808'Under-water cable burying device'1983 4,107,357'Method for effecting one side molten metal plating'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1992Patents assigned to NIPPON STEEL CORP (7)· patent assignee history

1983–1998Patents assigned to KOKUSAI DENSHIN DENWA CO LTD (10)· patent assignee history

1983–1987Based in Hachiohji, JP· patent location history

1985–2003Based in Tokyo, JP· patent location history

1986–1990Based in Kitakyushu, JP· patent location history

2003–2009Patents assigned to MITSUBISHI ELECTRIC CORP (3)· patent assignee history

2006–2017Based in Yokosuka, JP· patent location history

2007–2009Patents assigned to INDEPENDENT ADMINISTRATIVE INSTITUTION JAPAN AGENCY FOR MARINE EARTH SCI & TECH (3)· patent assignee history

2008–2009Based in Kanagawa, JP· patent location history

2016–2017Patents assigned to KYOCERA CORP (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
KOKUSAI DENSHIN DENWA CO LTD	10	1983–1998
NIPPON STEEL CORP	7	1978–1992
INDEPENDENT ADMINISTRATIVE INSTITUTION JAPAN AGENCY FOR MARINE EARTH SCI & TECH	3	2007–2009
MITSUBISHI ELECTRIC CORP	3	2003–2009
KYOCERA CORP	2	2016–2017

Locations

Location	Patents	Span
Tokyo, JP	6	1985–2003
Hachiohji, JP	6	1983–1987
Yokosuka, JP	5	2006–2017
Kitakyushu, JP	3	1986–1990
Kanagawa, JP	2	2008–2009