LexDanaLexDanabeta
Inventor

Seiji Maruo

Inventor
Hitachi, JP

Overview

19→
Patents
1993–2012
Patent span
Physics
Primary field (CPC G)

Patents· 19 as inventor

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

G03Gprimary
G03GElectrography35%
B41JTypewriters15%
G02BOptical elements, systems or apparatus12%
H04NPictorial communication, e.g. television12%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light8%
B60RVehicles, vehicle fittings, or vehicle parts, not otherwise provided for4%
B82YSpecific uses or applications of nanostructures4%
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light4%
G08BSignalling systems, e.g. personal calling systems4%
H04JMultiplex communication4%
PatentTitleYear
8,340,522'Filter assembly and optical module using same'20127,864,028'In-vehicle emergency call apparatus'20117,003,241'Image recording device and an image recording system'20066,836,632'Small-size color electro-photographic apparatus'20046,574,451'Small-size color electro-photographic apparatus'20036,271,874'Electrophotographic printer having an image memory, a horizontal scanning fringe correction exposure determining section, a vertical scanning fringe correction exposure determining section, and a switch'20016,131,000'Electrophotographic printing apparatus using electric potential dividing development'20006,085,051'Small-size color electro-photographic apparatus'20006,055,256'Laser beam printer and semiconductor laser device suitable for a light source thereof'20005,959,655'Light beam scanning apparatus which controls power and spot shape of light beam'19995,884,119'Light exposure controlling method of electrophotographic apparatus for suppressing fringe in picture'19995,832,333'Electrostatic recording apparatus and electrostatic recording method'19985,815,775'Color electro-photographic apparatus'19985,809,053'Semiconductor laser device and optical printing apparatus using the same'19985,737,008'Electrophotographic image recording apparatus with photoreceptor exposure control'19985,668,590'Optical beam scanning system with rotating beam compensation'19975,666,598'Image forming method and apparatus using energy beam impingement on image forming particles to move the same'19975,666,599'Color electro-photographic printing apparatus'19975,255,112'Optical scanning apparatus and system'1993

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1993–2004Patents assigned to HITACHI LTD (15)· patent assignee history
1993–2012Based in Hitachi, JP· patent location history
1997–2001Patents assigned to HITACHI KOKI KK (8)· patent assignee history
1998–2001Based in Ibaraki, JP· patent location history
1999Based in Hitachinaka, JP· patent location history
2000–2006Based in Chitose, JP· patent location history
2011Patents assigned to DENSO CORP (1)· patent assignee history
2011Based in Obu, JP· patent location history
2012Patents assigned to HITACHI CABLE (1)· patent assignee history
2012Patents assigned to KATAYAMA HIROKI (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD151993–2004
HITACHI KOKI KK81997–2001
DENSO CORP12011
HITACHI CABLE12012
KATAYAMA HIROKI12012
Locations
LocationPatentsSpan
Hitachi, JP121993–2012
Ibaraki, JP31998–2001
Chitose, JP22000–2006
Obu, JP12011
Hitachinaka, JP11999