Inventor
IGAWA TATSUO
JP24 patents
⚠️ This page may combine multiple inventors who share the name “IGAWA TATSUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
21 patentsUS4586790AMay 6, 1986
Display panel having uniaxially-stretched organic polymer film as the substrate
HITACHI LTD124 citations95
US5832350ANov 3, 1998
Developing apparatus and color electrophotographic apparatus using the same
HITACHI LTD62 citations94
US6443560B1Sep 3, 2002
Recording head and inkjet recording device having separately arranged ink chambers and ink discharge unit
HITACHI LTD37 citations92
US5252954AOct 12, 1993
Multiplexed driving method for an electrooptical device, and circuit therefor
HITACHI LTD33 citations92
US4783149ANov 8, 1988
Time-sharing drive liquid crystal optical switch array and optical printer using this optical switch array
HITACHI LTD25 citations92
US4591886AMay 27, 1986
Driving method and apparatus for optical printer with liquid-crystal switching element
HITACHI LTD39 citations92
US4505546AMar 19, 1985
Liquid crystal display device
HITACHI LTD45 citations92
US4362771ADec 7, 1982
Liquid crystal display element with gap controlling material and process for production thereof
HITACHI LTD50 citations92
US5321477AJun 14, 1994
Image forming apparatus capable of preventing the winding on the image carrier
HITACHI LTD23 citations88
US6604816B1Aug 12, 2003
Ink-jet recording head and ink-jet recorder
HITACHI LTD18 citations83
US5860049AJan 12, 1999
Developing apparatus and picture image forming apparatus
HITACHI LTD19 citations83
US5095376AMar 10, 1992
Apparatus and method for driving an optical printer having a liquid crystal optical switch
HITACHI LTD17 citations74
US4746196AMay 24, 1988
Multiplexed driving method for an optical switching element employing ferroelectric liquid crystal
HITACHI LTD13 citations74
US5559578ASep 24, 1996
Electrostatic recording apparatus with electrified cap and managing system thereof
HITACHI LTD12 citations73
US4712876ADec 15, 1987
Driving ferroelectric liquid crystal printers via short circuiting
HITACHI LTD12 citations73
US5373351ADec 13, 1994
Electrostatic recording apparatus and managing system thereof
HITACHI LTD5 citations63
US5177531AJan 5, 1993
Electrostatic recorder and electrostatic latent image measuring instrument
HITACHI LTD5 citations63
US4145101AMar 20, 1979
Method for manufacturing gas insulated electrical apparatus
HITACHI LTD2 citations63
US6557981B1May 6, 2003
Ink jet recorder
HITACHI LTD4 citations62
US5574546ANov 12, 1996
Developing apparatus for an electrophotographic machine
HITACHI LTD5 citations62
US4219707AAug 26, 1980
Distributor with coated alkaline earth oxide electrode
HITACHI LTD4 citations58