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Inventor

Keizou Ohta

Inventor
Tokyo, JP

Overview

2→
Patents
1976–1986
Patent span
Electricity
Primary field (CPC H)

Patents· 2 as inventor

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

H04Mprimary
H04MTelephonic communication100%
PatentTitleYear
D0284188'Telephone instrument'19863,937,906'Telephone hook switch comprising separately operable contact groups'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976Patents assigned to NIPPON ELECTRIC CO (1)· patent assignee history
1976–1986Based in Tokyo, JP· patent location history
1986Patents assigned to NEC CORP (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NEC CORP11986
NIPPON ELECTRIC CO11976
Locations
LocationPatentsSpan
Tokyo, JP21976–1986