Inventor · Numazu, JP

Katsuhisa Yamazaki

51Patents

28h-index

51Co-inventors

91Inventor score

Filing activity: Oct 6, 2000 → Feb 27, 2020

Most-cited inventions

Patent	Title	Area	Cited by	Status
US7537877B2	Toner used in electrophotography having toner particles and silica powder	Physics	53	Active
US9606462B2	Toner and method for manufacturing toner	Physics	51	Active
US7855042B2	Developer and image forming method	Physics	48	Active
US9470993B2	Magnetic toner	Physics	47	Active
US9201323B2	Toner	Physics	42	Active
US9341970B2	Toner	Physics	40	Active
US7700254B2	Toner with specified amounts of the THF-soluble matter having certain intrinsic viscosity	Physics	39	Active
US9261804B2	Toner	Physics	39	Active
US9097998B2	Toner	Physics	39	Active
US9971263B2	Toner	Physics	38	Active
US9128400B2	Toner	Physics	38	Active
US6875549B2	Dry toner, toner production process, image forming method and process cartridge	Physics	37	Expired
US10289016B2	Toner	Physics	36	Active
US9829818B2	Toner	Physics	36	Active
US10295921B2	Toner	Physics	36	Active
US9250548B2	Toner	Physics	35	Active
US10101683B2	Toner and external additive for toner	Physics	35	Active
US7740998B2	Positively chargeable developer	Physics	35	Active
US6586151B1	Toner, process for producing toner image forming method and apparatus unit	Physics	34	Expired
US9588450B2	Magnetic toner	Physics	33	Active
US6881527B2	Toner, and process cartridge	Physics	33	Expired
US6703176B2	Toner, process for producing toner image forming method and apparatus unit	Physics	31	Expired
US8501377B2	Magnetic toner	Physics	31	Active
US8512925B2	Magnetic toner	Physics	31	Active
US8057977B2	Toner	Physics	30	Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.