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Inventor

Masaaki Shigeyama

Inventor
Kudamatsu, JP

Overview

3→
Patents
2003–2009
Patent span
Performing operations
Primary field (CPC B)

Patents· 3 as inventor

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

B23Kprimary
B23KSoldering or unsoldering40%
Y10TTechnical subjects covered by former us classification40%
B61DBody details or kinds of railway vehicles20%
PatentTitleYear
7,601,432'Friction stir welding method and group of shape members for friction stir welding'20097,121,450'Friction stir welding method and group of shape members for friction stir welding'20066,651,567'Railway car'2003

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2003–2009Patents assigned to HITACHI LTD (3)· patent assignee history
2003Based in Yamaguchi, JP· patent location history
2006–2009Based in Kudamatsu, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD32003–2009
Locations
LocationPatentsSpan
Kudamatsu, JP22006–2009
Yamaguchi, JP12003