Inventor

Yoshinari Hamanishi

Inventor

Tokyo, JP

Overview

28→

Patents

1980–1999

Patent span

Physics

Primary field (CPC G)

Patents· 28 as inventor

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

G02Bprimary

G02BOptical elements, systems or apparatus90%

G03BApparatus or arrangements for taking photographs or for projecting or viewing them7%

G06FElectric digital data processing3%

PatentTitleYear

5,978,150'Zoom lens'1999 5,272,564'Zoom lens of internal focusing system'1993 5,257,137'Photo-taking lens for an underwater camera'1993 5,253,112'Rear conversion lens'1993 5,231,444'Camera system including rear conversion lens'1993 5,172,154'System camera'1992 5,136,430'Inner focusing type telephoto zoom lens'1992 5,126,883'Telephoto zoom lens'1992 5,007,720'Lens system enabling close distance photographing'1991 4,841,325'Automatic focusing device for camera'1989 4,812,868'Detecting apparatus for focus in camera'1989 4,804,991'Auto focusing light device'1989 4,796,045'Photo-taking lens assembly having an automatically and manually movable lens'1989 4,655,558'Rear focus conversion lens apparatus'1987 4,653,871'Rear conversion lens'1987 4,653,877'Rear-focus conversion device lens for telephoto lens'1987 4,641,928'Four-group telephoto zoom lens'1987 4,621,909'Photographic lens of a great aperture ratio'1986 4,591,234'Rear focus conversion lens'1986 4,514,051'Rear conversion lens'1985 4,468,097'Four-group great aperture ratio zoom lens'1984 4,468,096'Four-group telephoto zoom lens'1984 4,452,513'Zoom lens capable of close range photography and method of focusing the same to a short distance'1984 4,395,094'Large aperture ratio photographic lens with means for correcting aberrations'1983 4,392,724'Lens system capable of short distance photography'1983 4,260,223'Lens system for photographing objects from infinity to a very short distance'1981 4,223,981'Telephoto zoom lens'1980 4,206,971'Rear conversion lens'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–1987Patents assigned to NIPPON KOGAKU KK (15)· patent assignee history

1980–1989Based in Tokyo, JP· patent location history

1989–1999Patents assigned to NIKON CORP (13)· patent assignee history

1991–1993Based in Wako, JP· patent location history

1999Based in Ohtawara, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
NIPPON KOGAKU KK	15	1980–1987
NIKON CORP	13	1989–1999

Locations

Location	Patents	Span
Tokyo, JP	19	1980–1989
Wako, JP	8	1991–1993
Ohtawara, JP	1	1999