Inventor

Masaki Imaizumi

Inventor

Tokyo, JP

Overview

1985–1998

Patent span

Physics

Primary field (CPC G)

Patents· 15 as inventor

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

G02Bprimary

G02BOptical elements, systems or apparatus82%

G03BApparatus or arrangements for taking photographs or for projecting or viewing them12%

H04NPictorial communication, e.g. television6%

PatentTitleYear

5,731,905'Eyepiece lens system'1998 5,727,239'Photographing optical apparatus'1998 5,598,296'Prismatic telescope optical system'1997 5,581,400'Finder optical system with low-hygroscopic organic material'1996 5,557,464'Wide-field eyepiece lens system'1996 5,321,457'Real image type finder system that changes an aspect ratio of a visual field by varying magnification'1994 5,148,321'Compact zoom lens system'1992 4,715,693'Vari-focal photographic lens system of rear lens group exchange type'1987 4,708,442'Varifocal lens system'1987 4,693,566'Zoom lens system'1987 4,668,054'Vari-focal photographic lens system of lens group exchange type'1987 4,653,870'Compact vari-focal photographic lens system'1987 4,609,263'Telephoto lens system having an improved focusing arrangement'1986 4,562,344'Automatic focus detecting mechanism for endoscopes'1985 4,558,928'Focusing method for a telephoto lens system'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985–1998Patents assigned to OLYMPUS OPTICAL CO (15)· patent assignee history

1985–1994Based in Tokyo, JP· patent location history

1985Based in Hachiouji, JP· patent location history

1987Based in Nagano, JP· patent location history

1996–1998Based in Hachioji, JP· patent location history

1998Based in Urawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
OLYMPUS OPTICAL CO	15	1985–1998

Locations

Location	Patents	Span
Tokyo, JP	7	1985–1994
Hachioji, JP	4	1996–1998
Nagano, JP	2	1987
Urawa, JP	1	1998
Hachiouji, JP	1	1985