Inventor
YAMAGA HIROYOSHI
JP13 patents
⚠️ This page may combine multiple inventors who share the name “YAMAGA HIROYOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HODOGAYA CHEMICAL CO LTD
11 patentsUS4624907ANov 25, 1986
Electrophotographic toner containing metal complex
HODOGAYA CHEMICAL CO LTD83 citations94
US4433040AFeb 21, 1984
Electrophotographic toner containing a metal complex dye
HODOGAYA CHEMICAL CO LTD45 citations88
US5645967AJul 8, 1997
Charge controlling agent composition and toner containing said composition
HODOGAYA CHEMICAL CO LTD19 citations87
US5693445ADec 2, 1997
Electrostatic image developing toner
HODOGAYA CHEMICAL CO LTD12 citations72
US6552211B2Apr 22, 2003
Zirconium compound and electrophotographic toner employing it
HODOGAYA CHEMICAL CO LTD5 citations68
US5770341AJun 23, 1998
Friction charge-providing member for positively-chargeable toner
HODOGAYA CHEMICAL CO LTD3 citations61
US6110634AAug 29, 2000
Electrophotographic toner
HODOGAYA CHEMICAL CO LTD5 citations59
US6410198B1Jun 25, 2002
Zirconium compound and electrophotographic toner employing it
HODOGAYA CHEMICAL CO LTD3 citations57
US4977249ADec 11, 1990
Metal of hydroxy-phenylaze and hydroxy-naphthylazo compounds as near-red absorbers
HODOGAYA CHEMICAL CO LTD2 citations57
US5641884AJun 24, 1997
Spiro-naphtho-oxazine compound and photosensitive materials using the same
HODOGAYA CHEMICAL CO LTD1 citations52
US5164283ANov 17, 1992
Electrophotographic developing powder
HODOGAYA CHEMICAL CO LTD1 citations51