Inventor

Hisashi Tokumaru

Inventor

Osaka, JP

Overview

35→

Patents

1980–2002

Patent span

Physics

Primary field (CPC G)

Patents· 35 as inventor

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

G02Bprimary

G02BOptical elements, systems or apparatus67%

G03BApparatus or arrangements for taking photographs or for projecting or viewing them23%

G03GElectrography4%

H04NPictorial communication, e.g. television4%

H01GCapacitors2%

PatentTitleYear

6,429,975'Illumination optical system and projector using same'2002 6,339,510'Camera having a varifocal lens'2002 6,018,631'Camera having a varifocal lens'2000 5,640,223'Camera having a varifocal lens'1997 5,369,460'Camera having a varifocal lens'1994 5,365,297'Camera system with zoom lens having presettable focal lengths'1994 5,327,290'Compact size zoom lens system'1994 5,274,409'Camera with multiple lens driving modes'1993 5,274,414'Camera having a varifocal lens'1993 5,258,802'Camera system which compensates for defocusing during operation'1993 5,196,877'Viewfinder framing device for zoom lens camera'1993 5,153,777'Compact-size zoom lens system'1992 5,122,825'Zoom camera'1992 5,105,311'Zoom lens system having high zoom ratio ranging to wide field angle'1992 5,084,722'Focus condition detecting device'1992 4,951,075'Zoom camera'1990 4,916,473'Focus detection apparatus'1990 4,908,505'System for detecting the focus condition of a cata-dioptric lens and interchangeable lens for use therewith'1990 4,903,065'Focus condition detecting device'1990 4,878,076'Exposure controlling system and interchangeable lens therefor'1989 4,846,562'Zoom lens system'1989 4,844,600'Zoom lens system'1989 4,806,003'Inverted-telephoto type wide angle lens system'1989 4,794,416'Focus detection apparatus'1988 4,764,000'Telephoto lens system with three relatively shiftable lens groups'1988 4,759,617'Zoom lens system'1988 4,636,040'Zoom lens system'1987 4,591,235'Zoom lens system'1986 4,516,839'Zoom lens system'1985 4,474,459'Optical projection system'1984 4,449,793'Inverted telephoto type wide angle lens system'1984 4,448,499'Image transmitter for copying apparatus of slit exposure scanning type'1984 4,382,662'Inverted telephoto type wide angle lens system'1983 4,286,847'Lightweight inverted telephoto type wide angle lens system'1981 4,234,894'Reflecting optical system for projection television'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–1997Patents assigned to MINOLTA CAMERA KK (32)· patent assignee history

1980–2002Based in Osaka, JP· patent location history

1992–1994Based in Osakasayama, JP· patent location history

1992Based in Sayama, JP· patent location history

2000–2002Patents assigned to MINOLTA CO LTD (3)· patent assignee history

2002Based in Kawachinagano, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
MINOLTA CAMERA KK	32	1980–1997
MINOLTA CO LTD	3	2000–2002

Locations

Location	Patents	Span
Osaka, JP	30	1980–2002
Osakasayama, JP	3	1992–1994
Kawachinagano, JP	1	2002
Sayama, JP	1	1992