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Inventor

Katsuhiro Ohtake

Inventor
Omiya, JP

Overview

8→
Patents
1986–2001
Patent span
Physics
Primary field (CPC G)

Patents· 8 as inventor

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

G02Bprimary
G02BOptical elements, systems or apparatus57%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them43%
PatentTitleYear
6,198,581'Finder prism'20016,141,501'Finder device'20005,946,510'Albada type finder and camera therefor having a movable mask'19995,739,956'Real image albada finder'19985,666,576'Bright frame view-finder of natural lighting type additionally provided with light source for secondary diffusing surfaces'19975,519,468'Photographic camera provided with automatic preparation for photographing'1996D0287454'Cream pitcher'1986D0287206'Sugar bowl'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986Patents assigned to AMERICAN COMMERCIAL INC (2)· patent assignee history
1986Based in Mie, JP· patent location history
1996–2001Patents assigned to FUJI PHOTO OPTICAL CO LTD (6)· patent assignee history
1996–1997Based in Ohmiya, JP· patent location history
1998–2001Based in Omiya, JP· patent location history
2000Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
FUJI PHOTO OPTICAL CO LTD61996–2001
AMERICAN COMMERCIAL INC21986
Locations
LocationPatentsSpan
Omiya, JP31998–2001
Ohmiya, JP21996–1997
Mie, JP21986
Tokyo, JP12000