Inventor

Kiyoshi Toyama

Inventor

Gifu, JP

Overview

11→

Patents

1990–2000

Patent span

Physics

Primary field (CPC G)

Patents· 11 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 variable17%

H01FMagnets17%

H02KDynamo-electric machines17%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests13%

Y10TTechnical subjects covered by former us classification13%

G06KGraphical data reading7%

G08BSignalling systems, e.g. personal calling systems7%

G11BInformation storage based on relative movement between record carrier and transducer7%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein2%

PatentTitleYear

6,153,321'Method of using a substrate with magnetic substance of a magnetic scale'2000 5,580,639'Method of manufacturing magnetic patterns'1996 5,527,663'Method of manufacturing a medium having a magnetic pattern'1996 5,445,707'Method of manufacturing article having magnetic patterns'1995 5,434,934'Magneto-optically modulating system'1995 5,429,911'Method of manufacturing a medium having a magnetic pattern'1995 5,427,675'Method of manufacturing article having magnetic patterns'1995 5,350,618'Magnetic medium comprising a substrate having pits and grooves of specific shapes and depths'1994 5,336,586'Magnetic medium and method of manufacturing the same'1994 4,931,634'Optical position sensor using Kerr effect and a magnetic scale'1990 4,931,635'Optical position sensor using Faraday effect element and magnetic scale'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–1996Patents assigned to TEIJIN SEIKI CO LTD (9)· patent assignee history

1990–2000Based in Gifu, JP· patent location history

1995Patents assigned to TEIJIN SEIKO CO LTD (1)· patent assignee history

1995Based in Miyashiro, JP· patent location history

2000Patents assigned to TEIJUN SEIKI CO (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
TEIJIN SEIKI CO LTD	9	1990–1996
TEIJIN SEIKO CO LTD	1	1995
TEIJUN SEIKI CO	1	2000

Locations

Location	Patents	Span
Gifu, JP	10	1990–2000
Miyashiro, JP	1	1995