Inventor

Hayato Naito

Inventor

Nagano, JP

Overview

23→

Patents

1987–2015

Patent span

Electricity

Primary field (CPC H)

Patents· 23 as inventor

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

H02Pprimary

H02PControl or regulation of electric motors, electric generators or dynamo-electric converters37%

G01PMeasuring linear or angular speed, acceleration, deceleration, or shock9%

G02BOptical elements, systems or apparatus7%

G03BApparatus or arrangements for taking photographs or for projecting or viewing them7%

H02KDynamo-electric machines7%

H04NPictorial communication, e.g. television7%

G01DMeasuring not specially adapted for a specific variable5%

H03KPulse technique5%

G01BMeasuring length, thickness or similar linear dimensions2%

G01RMeasuring electric variables2%

PatentTitleYear

9,185,296'Optical unit with shake correcting function'2015 9,049,375'Optical unit with shake correcting function'2015 8,687,953'Photographic optical device, photographic optical system and distance variation amount detecting device'2014 6,791,824'Tape running apparatus, motor board, and capstan motor'2004 6,713,979'Actuator drive circuit'2004 6,552,505'Method for driving motors and apparatus for driving motors'2003 6,528,916'Brushless motor'2003 6,495,938'Brushless motor, method for operating brushless motor and method for manufacturing brushless motor'2002 5,761,375'Brushless motor speed detection device'1998 5,689,181'Brushless motor speed detecting apparatus for reducing generation of spike voltage'1997 5,686,770'Position detector of a brushless motor'1997 5,644,203'Brushless motor speed detector'1997 5,552,964'Switch mounted on circuit board and method of mounting switch on circuit board'1996 5,483,162'Magnetic detector for a frequency generator responsive to motor rotation'1996 5,378,967'Brushless motor drive circuit'1995 5,373,252'Circuit for preventing saturation of a transistor'1994 5,331,259'Brushless motor drive circuit'1994 5,237,247'Three-phase sine wave signal synthesizing circuit and brushless motor drive circuit using the same'1993 5,196,771'Brushless motor drive circuit'1993 5,173,645'Brushless motor drive circuit'1992 5,155,419'Brushless motor drive circuit having a highly accurate sinusoidal output signal'1992 5,140,232'Brushless motor drive circuit'1992 4,658,190'Reduced ripple drive circuit for a brushless motor'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–2004Patents assigned to SANKYO SEIKI SEISAKUSHO KK (18)· patent assignee history

1987–2015Based in Nagano, JP· patent location history

1992–1997Based in Komagane, JP· patent location history

2014–2015Patents assigned to NIDEC SANKYO CORP (3)· patent assignee history

2014–2015Patents assigned to ISHIHARA HISAHIRO (2)· patent assignee history

2014–2015Patents assigned to KARASAWA TOSHIYUKI (2)· patent assignee history

2014–2015Patents assigned to KOMATSU RYOJI (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SANKYO SEIKI SEISAKUSHO KK	18	1987–2004
NIDEC SANKYO CORP	3	2014–2015
ISHIHARA HISAHIRO	2	2014–2015
KARASAWA TOSHIYUKI	2	2014–2015
KOMATSU RYOJI	2	2014–2015

Locations

Location	Patents	Span
Nagano, JP	15	1987–2015
Komagane, JP	8	1992–1997