Inventor
KAWAI HAJIME
JP14 patents
⚠️ This page may combine multiple inventors who share the name “KAWAI HAJIME”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
YAMADA CHEM CO
9 patentsUS4814320AMar 21, 1989
Heat-sensitive recording material
YAMADA CHEM CO7 citations72
US4444591AApr 24, 1984
Chromogenic compounds and the use thereof as color former in copying or recording materials
YAMADA CHEM CO12 citations71
US4835291AMay 30, 1989
Divinyl compounds and chromogenic recording-material prepared by using thereof
YAMADA CHEM CO3 citations59
US4747875AMay 31, 1988
Chromogenic azaphthalide compound and a colour-forming recording composition containing the same
YAMADA CHEM CO2 citations59
US4564679AJan 14, 1986
Chromogenic compounds
YAMADA CHEM CO3 citations59
US4845245AJul 4, 1989
Process for producing 3,3-bis-(4-dimethylaminophenyl)-6-dimethylaminophthalide
YAMADA CHEM CO0 citations49
US5179066AJan 12, 1993
Thermosensitive recording material
YAMADA CHEM CO0 citations48
US4808567AFeb 28, 1989
Divinyl compounds and chromogenic recording-material prepared by using thereof
YAMADA CHEM CO1 citations48
US5286702AFeb 15, 1994
Phthalide compound and recording material using the compound
YAMADA CHEM CO0 citations44
OMRON TATEISI ELECTRONICS CO
4 patentsUS9927757B2Mar 27, 2018
Toner density sensor and image forming device
OMRON TATEISI ELECTRONICS CO0 citations51
US9405220B2Aug 2, 2016
Optical sensor, image forming device, and method for correcting toner concentration
OMRON TATEISI ELECTRONICS CO0 citations48
US9594017B2Mar 14, 2017
Reflective sensor
OMRON TATEISI ELECTRONICS CO0 citations38
US8873990B2Oct 28, 2014
Toner density sensor and image forming apparatus
OMRON TATEISI ELECTRONICS CO0 citations36