Inventor

Michio Nakagawa

Inventor

Yokohama, JP

Overview

10→

Patents

1983–2018

Patent span

Physics

Primary field (CPC G)

Patents· 10 as inventor

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

G11Cprimary

G11CStatic stores33%

G05FSystems for regulating electric or magnetic variables10%

H10DInorganic electric semiconductor devices10%

B01DSeparation5%

C02FTreatment of water, waste water, sewage, or sludge5%

E04HBuildings or like structures for particular purposes5%

E05FDevices for moving wings into open or closed position5%

E05YIndexing scheme associated with subclasses e05d and e05f, relating to construction elements, electric control, power supply, power signal or transmission, user interfaces, mounting or coupling, details, accessories, auxiliary operations not otherwise provided for, application thereof5%

E06BFixed or movable closures for openings in buildings, vehicles, fences or like enclosures in general, e.g. doors, windows, blinds, gates5%

F04DNon-positive-displacement pumps5%

PatentTitleYear

9,985,519Voltage generation circuit2018 7,701,773'Nonvolatile semiconductor storage device and operation method thereof'2010 7,643,358'Non volatile semiconductor memory device'2010 7,596,020'Multi-level nonvolatile semiconductor memory device capable of discretely controlling a charge storage layer potential based upon accumulated electrons'2009 7,545,684'Nonvolatile semiconductor storage device and operation method thereof'2009 7,190,211'Semiconductor device equipped with a voltage step-up circuit'2007 6,888,399'Semiconductor device equipped with a voltage step-up circuit'2005 5,277,543'Device for monitoring abrasion loss of a thrust bearing in a submerged motor pump'1994 5,192,413'Electroosmotic dewaterer'1993 4,406,087'Aseismatic device for doors'1983

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1983Patents assigned to ASAKA HIROSHI (1)· patent assignee history

1983Based in Hyogo, JP· patent location history

1993–1994Patents assigned to FUJI ELECTRIC CO LTD (2)· patent assignee history

1993–2009Based in Kanagawa, JP· patent location history

1994Patents assigned to DORYOKURO KAKUNENRYO KATHATSU (1)· patent assignee history

2005–2007Patents assigned to ROHM CO LTD (2)· patent assignee history

2005–2007Based in Kyoto, JP· patent location history

2009–2010Patents assigned to TOSHIBA KK (4)· patent assignee history

2009–2018Based in Yokohama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
TOSHIBA KK	4	2009–2010
FUJI ELECTRIC CO LTD	2	1993–1994
ROHM CO LTD	2	2005–2007
ASAKA HIROSHI	1	1983
DORYOKURO KAKUNENRYO KATHATSU	1	1994

Locations

Location	Patents	Span
Yokohama, JP	4	2009–2018
Kanagawa, JP	3	1993–2009
Kyoto, JP	2	2005–2007
Hyogo, JP	1	1983