Inventor

Kou Ishizuka

Inventor

Omiya, JP

Overview

1991–2006

Patent span

Physics

Primary field (CPC G)

Patents· 15 as inventor

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

G01Dprimary

G01DMeasuring not specially adapted for a specific variable63%

G11BInformation storage based on relative movement between record carrier and transducer21%

F02BInternal-combustion piston engines5%

G01PMeasuring linear or angular speed, acceleration, deceleration, or shock5%

G01SRadio direction-finding5%

PatentTitleYear

6,999,179'Optical encoder'2006 6,831,267'Optical encoder'2004 6,631,047'Interference device, position detecting device, positioning device and information recording apparatus using the same'2003 6,259,531'Displacement information measuring apparatus with hyperbolic diffraction grating'2001 6,151,185'Position detecting apparatus, positioning apparatus, and information recording apparatus using the same'2000 6,005,667'Optical displacement measurement apparatus and information recording apparatus'1999 5,956,140'Displacement detection apparatus and drive control apparatus using the same constructed to prevent collision between gratings'1999 5,930,066'Information recording apparatus'1999 5,917,182'Rotation detector and controller for detecting rotation information using a grating interference system'1999 5,883,384'Rotational displacement information detection apparatus'1999 5,880,839'Optical displacement measuring apparatus including a light-emitting element and an adjacent ball lens'1999 5,742,391'Optical type sensor for use as an optical measuring head or optical pickup'1998 5,663,794'Displacement information detection apparatus, scale used in the apparatus, and drive apparatus using the apparatus'1997 5,534,693'Optical displacement detection apparatus employing diffraction gratings and a reference position sensor located on the scale'1996 5,067,813'Optical apparatus for measuring displacement of an object'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–2006Patents assigned to CANON KK (15)· patent assignee history

1991Based in Urawa, JP· patent location history

1996–2000Based in Ohmiya, JP· patent location history

1998–2003Based in Omiya, JP· patent location history

2004–2006Based in Saitama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
CANON KK	15	1991–2006

Locations

Location	Patents	Span
Omiya, JP	6	1998–2003
Ohmiya, JP	6	1996–2000
Saitama, JP	2	2004–2006
Urawa, JP	1	1991