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Inventor

Keiji Usuba

Inventor
Yokohama, JP

Overview

8→
Patents
2003–2012
Patent span
Electricity
Primary field (CPC H)

Patents· 8 as inventor

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

H04Lprimary
H04LTransmission of digital information, e.g. telegraphic communication28%
H04WWireless communication networks28%
H04BTransmission22%
H04JMultiplex communication17%
H04QSelecting6%
PatentTitleYear
8,116,263'Radio communication apparatus'20128,094,600'Radio communication apparatus'20128,073,381'Radio communication system and base station'20117,996,033'Radio communication system and base station'20117,724,724'Radio communication apparatus'20107,184,661'Transmission equipment for network and network transmission system'20077,054,334'Pathsize control method and operation of transmission apparatus'20066,614,754'Bi-directional line switched ring network system'2003

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2003–2012Patents assigned to HITACHI LTD (7)· patent assignee history
2003–2012Based in Yokohama, JP· patent location history
2011–2012Patents assigned to KAWAMOTO KIYOSHI (3)· patent assignee history
2011–2012Patents assigned to MAZAWA SHIRO (3)· patent assignee history
2011–2012Patents assigned to TAKAHASHI YOSUKE (3)· patent assignee history
2011–2012Patents assigned to USUBA KEIJI (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD72003–2012
KAWAMOTO KIYOSHI32011–2012
MAZAWA SHIRO32011–2012
TAKAHASHI YOSUKE32011–2012
USUBA KEIJIself32011–2012
Locations
LocationPatentsSpan
Yokohama, JP82003–2012