Inventor

Shigeo Koyama

Inventor

Osaka, JP

Overview

28→

Patents

1981–2002

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.

G03Gprimary

G03GElectrography43%

B21DWorking or processing of sheet metal or metal tubes, rods or profiles without essentially removing material10%

B65HHandling thin or filamentary material, e.g. sheets, webs, cables10%

G03BApparatus or arrangements for taking photographs or for projecting or viewing them8%

G06KGraphical data reading8%

H04NPictorial communication, e.g. television8%

B41JTypewriters5%

Y10TTechnical subjects covered by former us classification5%

A63FCard, board, or roulette games3%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests3%

PatentTitleYear

6,422,939'Storage medium for storing an application program for a car racing game'2002 5,934,133'Bending press system'1999 5,694,801'Bending press system'1997 5,668,581'Ink jet printing apparatus'1997 5,521,681'Image forming apparatus'1996 5,202,728'Image-forming machine with improved developer agitating means, developer regulating blade means, cleaning device, and toner recovery system'1993 5,111,244'Image-forming machine with improved process and optional unit assemblies'1992 5,056,768'Image-forming machine'1991 5,028,966'Image-forming machine'1991 4,968,016'Image-forming machine'1990 D0309911'Process unit for copying machine'1990 4,751,484'Drum unit exchange time indicating device for image forming apparatus'1988 4,658,625'Bending machine and a die changing system for such bending machine'1987 4,656,861'Bending machine and a die changing system for such bending machine'1987 4,640,604'Electrostatic photographic copying machine provided with a movable sorter'1987 4,585,324'Shell-type electrostatic copying apparatus'1986 4,582,418'Variable magnification electrostatic copying apparatus'1986 4,569,586'Paper supply system of copying machine'1986 4,548,394'Copying paper conveying device in electrostatic copying apparatus'1985 4,477,173'Toner replenishing device for an electrostatic copying apparatus'1984 4,468,111'Developing device for use on an electrostatic copying apparatus'1984 4,452,530'Copying apparatus equipped with an original-support device, and an original-holding mechanism therefor'1984 4,444,494'Copying apparatus equipped with an original-support device, and an original-holding mechanism therefor'1984 4,436,412'Cleaning device for use on an electrostatic copying apparatus'1984 4,410,259'Apparatus for developing latent electrostatic image'1983 4,400,077'Photosensitive drum for electrostatic copying apparatus'1983 4,387,889'Copying apparatus provided with a cassette-type paper feeding mechanism'1983 4,259,008'Electrostatic copying apparatus'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–1997Patents assigned to MITA INDUSTRIAL CO LTD (23)· patent assignee history

1981–1984Based in Toyonaka, JP· patent location history

1984–1997Based in Osaka, JP· patent location history

1986–1993Based in Ibaraki, JP· patent location history

1987–1999Patents assigned to AMADA CO LTD (4)· patent assignee history

1987Based in Hatano, JP· patent location history

1997–1999Based in Kanagawa, JP· patent location history

2002Patents assigned to GENKI CO LTD (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
MITA INDUSTRIAL CO LTD	23	1981–1997
AMADA CO LTD	4	1987–1999
GENKI CO LTD	1	2002

Locations

Location	Patents	Span
Osaka, JP	9	1984–1997
Ibaraki, JP	7	1986–1993
Toyonaka, JP	6	1981–1984
Kanagawa, JP	2	1997–1999
Hatano, JP	2	1987