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Inventor

Tadao Koga

Inventor
Kisarazu, JP

Overview

3→
Patents
1977–1987
Patent span
Chemistry
Primary field (CPC C)

Patents· 3 as inventor

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

C21Dprimary
C21DModifying the physical structure of ferrous metals25%
Y02PClimate change mitigation technologies in the production or processing of goods25%
A61GTransport, personal conveyances, or accommodation specially adapted for patients or disabled persons13%
B23KSoldering or unsoldering13%
F16LPipes13%
H05BElectric heating13%
PatentTitleYear
4,694,131'Induction heating method and apparatus for relieving residual stress in welded joint between main and branch pipes'19874,687,894'Induction heating method and apparatus for relieving residual stress in welded joints in pipe line'19874,045,051'Foldable wheel chair'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977Patents assigned to YAESU REHABILI CO LTD (1)· patent assignee history
1977Based in Fukuoka, JP· patent location history
1987Patents assigned to DAIICHI KOSHUHA KOGYO KK (2)· patent assignee history
1987Patents assigned to ISHIKAWAJIMA HARIMA HEAVY IND (2)· patent assignee history
1987Based in Kisarazu, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DAIICHI KOSHUHA KOGYO KK21987
ISHIKAWAJIMA HARIMA HEAVY IND21987
YAESU REHABILI CO LTD11977
Locations
LocationPatentsSpan
Kisarazu, JP21987
Fukuoka, JP11977