Inventor

Hirochika Nakajima

Inventor

Kawasaki, JP

Overview

5→

Patents

1987–2001

Patent span

Physics

Primary field (CPC G)

Patents· 5 as inventor

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

G02Bprimary

G02BOptical elements, systems or apparatus22%

G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light11%

G01RMeasuring electric variables11%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein11%

G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices11%

H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light11%

H05KPrinted circuits11%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests11%

PatentTitleYear

6,236,786'Substrate with optical waveguide and method of making the same'2001 5,080,486'Spectrum measuring equipment utilizing double-image polarizing element'1992 4,806,442'Spatial phase modulating masks and production processes thereof, and processes for the formation of phase-shifted diffraction gratings'1989 4,730,884'Bipolar voltage controlled optical switch using intersecting waveguides'1988 4,637,027'Laser light source device'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–1992Patents assigned to FUJITSU LTD (4)· patent assignee history

1987–1992Based in Kawasaki, JP· patent location history

1992Patents assigned to ADVANTEST CORP (1)· patent assignee history

2001Patents assigned to BROTHER IND LTD (1)· patent assignee history

2001Patents assigned to NAKAJIMA HIROCHIKA (1)· patent assignee history

2001Based in Aichi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
FUJITSU LTD	4	1987–1992
ADVANTEST CORP	1	1992
BROTHER IND LTD	1	2001
NAKAJIMA HIROCHIKAself	1	2001

Locations

Location	Patents	Span
Kawasaki, JP	4	1987–1992
Aichi, JP	1	2001