Inventor

SUGANUMA TOHRU

JP15 patents

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

RICOH KK

3 patents

US5652079AJul 29, 1997

Carrier for dry two-component developer and method of producing the same

RICOH KK37 citations92

US7318990B2Jan 15, 2008

Toner, developer, image forming method, image forming apparatus and toner manufacturing method

RICOH KK12 citations82

US7438245B2Oct 21, 2008

Milling and classifying apparatus, collision mill, air classifier, toner, and method for producing toner

RICOH KK10 citations77

NAGAYAMA MASASHI

2 patents

US12436479B2Oct 7, 2025

Carrier for forming electrophotographic image, developer for forming electrophotographic image, electrophotographic image forming method, electrophotographic image forming apparatus, and process cartridge

NAGAYAMA MASASHI0 citations60

US10025214B2Jul 17, 2018

Carrier, developing agent, image forming apparatus, image forming method, replenishment toner, and process cartridge

NAGAYAMA MASASHI0 citations38

TAKII MARIKO

2 patents

US10474051B2Nov 12, 2019

Carrier for developer of electrostatic latent image, two-component developer, replenishing developer, image forming apparatus, and toner stored unit

TAKII MARIKO0 citations47

US10444651B2Oct 15, 2019

Carrier, developer, supplemental developer, image forming apparatus, image forming method, and process cartridge

TAKII MARIKO0 citations47

RICOH TECHNOLOGY RES INC

1 patent

US6319646B1Nov 20, 2001

Carrier for electrophotographic developer, method for manufacturing, developer, container including the developer, and image forming apparatus using the developer wherein the carrier satisfies the relationship 1.0≦C2/C1≦1.3

RICOH TECHNOLOGY RES INC14 citations70

KISHIDA HIROYUKI

1 patent

US12147192B2Nov 19, 2024

Carrier for developing electrostatic latent image, two-component developer, image forming apparatus, process cartridge, and image forming method

KISHIDA HIROYUKI0 citations60

SUZUKI NAMIE

1 patent

US12379678B2Aug 5, 2025

Carrier for forming electrophotographic image, developer, image forming method, image forming apparatus, and process cartridge

SUZUKI NAMIE0 citations58

MASUKO KAEDE

1 patent

US12372893B2Jul 29, 2025

Carrier, developer, image forming method, and process cartridge

MASUKO KAEDE0 citations54

TAKEUCHI KENTO

1 patent

US12105472B2Oct 1, 2024

Carrier for forming electrophotographic image, developing agent for forming electrophotographic image, method of forming electrophotographic image, electrophotographic image forming apparatus, and process cartridge

TAKEUCHI KENTO0 citations54

SAKATA KOICHI

1 patent

US10234783B2Mar 19, 2019

Carrier, developer, image forming apparatus, developer stored unit, and image forming method

SAKATA KOICHI0 citations50

MASUDA MINORU

1 patent

US11934145B2Mar 19, 2024

Developing apparatus, developer for electrophotographic image formation, electrophotographic image forming method, and electrophotographic image forming apparatus

MASUDA MINORU0 citations49

RICOH CO LTD

1 patent

US8012662B2Sep 6, 2011

Method of manufacturing toner

RICOH CO LTD0 citations40