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Inventor

Tokuhisa Ito

Inventor
Tokyo, JP

Overview

3→
Patents
1985–1987
Patent span
Physics
Primary field (CPC G)

Patents· 3 as inventor

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

G01Bprimary
G01BMeasuring length, thickness or similar linear dimensions33%
G02BOptical elements, systems or apparatus33%
G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices33%
PatentTitleYear
4,650,335'Comparison type dimension measuring method and apparatus using a laser beam in a microscope system'19874,625,103'Automatic focusing device in microscope system'19864,512,642'Automatic focusing apparatus in optical drawing machine'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985–1987Patents assigned to ASAHI OPTICAL CO LTD (3)· patent assignee history
1985–1987Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ASAHI OPTICAL CO LTD31985–1987
Locations
LocationPatentsSpan
Tokyo, JP31985–1987