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Inventor

Keijiro Sakamoto

Inventor
Okazaki, JP

Overview

9→
Patents
1988–2001
Patent span
Physics
Primary field (CPC G)

Patents· 9 as inventor

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

G02Bprimary
G02BOptical elements, systems or apparatus80%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them20%
PatentTitleYear
6,285,507'Color image reading lens system'20016,275,342'Zoom lens system'20016,172,818'Zoom lens system'20015,623,370'Gradient index lens system'19975,602,680'Finite conjugate distance zoom lens system'19975,204,780'Lens system for a copying machine'19935,050,973'Symmetrical lens system for use in copying machine'19914,880,292'Transmission viewing screen of image projector apparatus'19894,789,880'Focusing device for use in optical apparatuses'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988–1997Patents assigned to MINOLTA CAMERA KK (5)· patent assignee history
1988–1997Based in Toyokawa, JP· patent location history
1989Based in Osaka, JP· patent location history
1991–1993Based in Kaloleni, KE· patent location history
1997–2001Patents assigned to MINOLTA CO LTD (4)· patent assignee history
1997Based in Toyokwa, JP· patent location history
2001Based in Okazaki, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MINOLTA CAMERA KK51988–1997
MINOLTA CO LTD41997–2001
Locations
LocationPatentsSpan
Okazaki, JP32001
Toyokawa, JP21988–1997
Kaloleni, KE21991–1993
Toyokwa, JP11997
Osaka, JP11989