Inventor

YOSHIHARA MAYUMI

JP8 patents

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

RICOH CO LTD

2 patents

US11274221B2Mar 15, 2022

Ink, ink set, ink container, image forming method, image forming apparatus and recorded matter

RICOH CO LTD2 citations70

US8351823B2Jan 8, 2013

Image forming apparatus, image bearing member, and method of manufacturing image bearing member

RICOH CO LTD0 citations50

YOSHIHARA MAYUMI

2 patents

US12497527B2Dec 16, 2025

Ink, image forming apparatus, and image forming method

YOSHIHARA MAYUMI0 citations53

US9864322B2Jan 9, 2018

Image forming apparatus

YOSHIHARA MAYUMI0 citations34

FUJIWARA YUKIO

1 patent

US8293439B2Oct 23, 2012

Electrophotographic photorecptor, method of manufacturing electrophotographic photorecptor, image forming apparatus, and process cartridge

FUJIWARA YUKIO6 citations71

TAKAHASHI HIROAKI

1 patent

US12215238B2Feb 4, 2025

Clear ink, printing method, and inkjet printing apparatus

TAKAHASHI HIROAKI0 citations60

MATSUYAMA AKIHIKO

1 patent

US11059983B2Jul 13, 2021

Ink, ink container, inkjet recording device, and recording method

MATSUYAMA AKIHIKO0 citations60

YAMASHITA MASAHIDE

1 patent

US9201334B2Dec 1, 2015

Residual voltage reducing processing cartridge, image forming apparatus with same, and image forming method

YAMASHITA MASAHIDE0 citations38