Inventor
OGAWA TADASHI
JP159 patents
⚠️ This page may combine multiple inventors who share the name “OGAWA TADASHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJI PHOTO FILM CO LTD
19 patentsUS5496689AMar 5, 1996
Silver halide color photographic materials
FUJI PHOTO FILM CO LTD24 citations93
US5057405AOct 15, 1991
Silver-halide color photographic light-sensitive material
FUJI PHOTO FILM CO LTD38 citations93
US4857449AAug 15, 1989
Silver halide color photographic photosensitive materials
FUJI PHOTO FILM CO LTD43 citations93
US4837140AJun 6, 1989
Color image-forming high silver chloride color photographic material having improved spectral sensitivity and silver removability for use therewith
FUJI PHOTO FILM CO LTD26 citations93
US4366237ADec 28, 1982
Silver halide color photographic light-sensitive material
FUJI PHOTO FILM CO LTD41 citations93
US4791053ADec 13, 1988
Silver halide photographic material
FUJI PHOTO FILM CO LTD19 citations82
US4435503AMar 6, 1984
Silver halide color photographic light-sensitive material
FUJI PHOTO FILM CO LTD21 citations82
US4411987AOct 25, 1983
Silver halide color photographic light-sensitive material
FUJI PHOTO FILM CO LTD19 citations82
US5198328AMar 30, 1993
Silver halide color photographic light-sensitive material
FUJI PHOTO FILM CO LTD18 citations74
US5153111AOct 6, 1992
Composition for color-development and method for processing using same
FUJI PHOTO FILM CO LTD15 citations74
US5075204ADec 24, 1991
Silver halide color photosensitive material having a reflective support and a specified volume ratio
FUJI PHOTO FILM CO LTD7 citations74
US4894319AJan 16, 1990
Color image-forming process for high silver chloride color photographic material having improved spectral sensitivity and silver removability
FUJI PHOTO FILM CO LTD6 citations74
US4857444AAug 15, 1989
Color photographic light-sensitive material
FUJI PHOTO FILM CO LTD17 citations74
US4806460AFeb 21, 1989
Multilayer silver halide color photographic materials
FUJI PHOTO FILM CO LTD17 citations74
US4797349AJan 10, 1989
Method for forming a color image comprising developing a light sensitive material containing a surfactant with a developer not containing benzyl alcohol
FUJI PHOTO FILM CO LTD10 citations74
US4786588ANov 22, 1988
Silver halide photographic materials
FUJI PHOTO FILM CO LTD7 citations74
US4735894AApr 5, 1988
Silver halide photographic emulsion and photographic material containing the same which comprise junction-type silver halide crystal grains
FUJI PHOTO FILM CO LTD8 citations74
US4686175AAug 11, 1987
Silver halide multi-layered color photographic light sensitive material
FUJI PHOTO FILM CO LTD15 citations74
US4126472ANov 21, 1978
Process of making a lithographic photosensitive silver halide emulsion having reduced susceptibility to pressure containing an iridium compound, a hydroxytetrazaindene and a polyoxyethylene
FUJI PHOTO FILM CO LTD11 citations74
RICOH KK
8 patentsUS7801457B2Sep 21, 2010
Fixing device, image forming apparatus including the fixing device, and fixing method
RICOH KK65 citations98
US7796933B2Sep 14, 2010
Fixing device using electromagnetic induction heating and image forming apparatus including same
RICOH KK56 citations98
US7783240B2Aug 24, 2010
Fixing device, image forming apparatus including the fixing device, and fixing method
RICOH KK65 citations98
US7509085B2Mar 24, 2009
Image forming apparatus, fixing apparatus and toner
RICOH KK95 citations96
US7734208B2Jun 8, 2010
Image fixing apparatus and image forming apparatus capable of effectively controlling an image fixing temperature
RICOH KK28 citations93
US7693439B2Apr 6, 2010
Fixing device, and method and device for heating control used in the same
RICOH KK29 citations93
US7817952B2Oct 19, 2010
Fixer and image forming apparatus including the same
RICOH KK28 citations92
US7778581B2Aug 17, 2010
Fixing unit having enhanced heating efficiency and image forming apparatus using the same
RICOH KK29 citations92
RICOH CO LTD
3 patentsUS8014711B2Sep 6, 2011
Fixing unit having enhanced temperature control and image forming apparatus using the same
RICOH CO LTD34 citations92
US7885590B2Feb 8, 2011
Image forming apparatus and fixing device
RICOH CO LTD29 citations92
US10935911B2Mar 2, 2021
Fixing device capable of enhancing durability of endless belt and image forming apparatus incorporating the same
RICOH CO LTD1 citations73
TOYO INK MFG CO
3 patentsOGAWA TADASHI
2 patentsKAWATA TEPPEI
2 patentsUS9811031B2Nov 7, 2017
Fixing device capable of enhancing durability of endless belt and image forming apparatus incorporating the same
KAWATA TEPPEI4 citations83
US8886101B2Nov 11, 2014
Fixing device capable of enhancing durability of endless belt and image forming apparatus incorporating the same
KAWATA TEPPEI7 citations83
RICOH LTD
1 patentSUMITOMO CEMENT CO
1 patentKOMATSU DENSHI KINZOKU KK
1 patentUBE INDUSTRIES
1 patentSEIKISUI CHEMICAL CO LTD
1 patentMABUCHI HIROYUKI
1 patentTOSHIBA KK
1 patentNIPPON DENSO CO
1 patentARAI YUJI
1 patentHASE TAKAMASA
1 patentSEO HIROSHI
1 patentPIONEER ELECTRONIC CORP
1 patentLEC KK
1 patentShowing the top 50 of 159 patents by PatentIndex Score.