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Inventor

Kouhei Katayama

Inventor
Wakayama, JP

Overview

4→
Patents
1996–2012
Patent span
Physics
Primary field (CPC G)

Patents· 4 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G03Gprimary
G03GElectrography80%
H04NPictorial communication, e.g. television20%
PatentTitleYear
8,227,160'Toner for electrophotography'20127,235,337'Toner for electrostatic image development'20076,377,766'Electrophotographic apparatus having a printing density controller for dropout and non-dropout color'20025,579,091'Developing unit for electro-photographic apparatus'1996

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1996–2002Patents assigned to HITACHI KOKI KK (2)· patent assignee history
1996Based in Hitachinaka, JP· patent location history
2002Based in Ibaraki, JP· patent location history
2007–2012Patents assigned to KAO CORP (2)· patent assignee history
2007–2012Based in Wakayama, JP· patent location history
2012Patents assigned to HIDAKA YASUHIRO (1)· patent assignee history
2012Patents assigned to KATAYAMA KOUHEI (1)· patent assignee history
2012Patents assigned to OHTAWA YASUKI (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI KOKI KK21996–2002
KAO CORP22007–2012
HIDAKA YASUHIRO12012
KATAYAMA KOUHEIself12012
OHTAWA YASUKI12012
Locations
LocationPatentsSpan
Wakayama, JP22007–2012
Ibaraki, JP12002
Hitachinaka, JP11996