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Inventor

Hitoshi Imagawa

Inventor
Kunitachi, JP

Overview

5→
Patents
1981–1997
Patent span
Electricity
Primary field (CPC H)

Patents· 5 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 communication43%
H04QSelecting43%
H04JMultiplex communication14%
PatentTitleYear
5,594,724'Transmission convergence sublayer multiplex generating/terminating apparatus'19975,022,025'Self-routing switch and its routing method'19914,864,558'Self-routing switch'19894,328,398'Digital multi-frequency receiver'19824,245,325'Digital multifrequency signalling receiver'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–1997Patents assigned to NIPPON TELEGRAPH & TELEPHONE (4)· patent assignee history
1981–1982Based in Hachioji, JP· patent location history
1982Patents assigned to OKI ELECTRIC IND CO LTD (1)· patent assignee history
1989–1991Based in Kunitachi, JP· patent location history
1997Patents assigned to NEC CORP (1)· patent assignee history
1997Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NIPPON TELEGRAPH & TELEPHONE41981–1997
NEC CORP11997
OKI ELECTRIC IND CO LTD11982
Locations
LocationPatentsSpan
Kunitachi, JP21989–1991
Hachioji, JP21981–1982
Tokyo, JP11997