Inventor

OOYOSHI HIROBUMI

JP45 patents

⚠️ This page may combine multiple inventors who share the name “OOYOSHI HIROBUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

OOYOSHI HIROBUMI

RICOH KK

Toner recovery belt conveyor, process cartridge, and image forming apparatus using the same

Toner collecting device, image forming unit and image forming apparatus

Process cartridge for image forming apparatus

Process cartridge for image forming apparatus

Process cartridge for image forming apparatus

Developing apparatus

Process cartridge for image forming apparatus

Process cartridge for image forming apparatus

Developing device using developer of particular properties suitable therefore

Charging-roller bearing member, process cartridge, and image forming apparatus

Conveyor device, process cartridge, image forming apparatus, and method of forming image

RICOH CO LTD

Toner conveying device, process cartridge, and image forming apparatus

Developing device of image forming apparatus

Developing device, process cartridge and image forming apparatus

Developing device and image forming apparatus that uses this developing device

Waste-toner collecting device, process cartridge, and image forming apparatus

Waste-toner housing device, and image forming apparatus

Powder conveyance device, toner conveyance device, process cartridge and image forming apparatus

Cleaning device and image forming apparatus

Development device, process unit, and image forming apparatus

OOYOSHI HIROBUMI

Powder container

Rotating-body electrification mechanism, image carrier unit, process cartridge, image forming apparatus, and method for electrifying image carrier unit

Developing device, process unit, and image forming apparatus, with supporting members, grooves, and supported developing roller

Developing device, process cartridge, and image forming apparatus

Toner conveyance device, process unit, and image forming apparatus

Toner conveyor, process cartridge, and image forming apparatus

KUBOTA TOMOHIRO

Developer amount detector, and developer container, development device, and image forming apparatus incorporating same

Toner cartridge with refillable fresh and residual toner chambers, process cartridge, and method of making toner cartridge reusable

Seal member, developing device, process cartridge, and image forming apparatus

Seal member, developing device, process cartridge, and image forming apparatus

YOSHIDA TOMOFUMI

Process cartridge and image forming apparatus

Toner-collecting device and image forming apparatus

Powder transport screw, and development device, process unit and image-forming apparatus comprising this powder transport screw

Toner agitating unit, toner hopper, process cartridge, and image forming apparatus

SHIMIZU YOSHIYUKI

Toner conveyer device, process cartridge, and image forming apparatus

Latent image carrier having pairs of first and second positioning protrusions and image forming apparatus

Process unit including a rotatable shaft along a driving force vector and image forming apparatus including the same

KAWAKAMI YOSHIHIRO

Process cartridge and image forming apparatus

Cleaning device, process cartridge, and image forming apparatus

TOYODA MINORU

Mechanism for electrifying, method of electrifying, and conductive member

Mechanism for electrifying, method of electrifying, and conductive member

RICOH PRINTING SYS LTD

Cleaning device for image forming apparatus

Image forming apparatus and image forming unit

HAMADA MANABU

Image forming apparatus capable of effectively utilizing interior space

NAKAMURA KENJI

Developer container, developing device, process cartridge, image forming device, and developer refilling method