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Inventor

Tomoyoshi Iwao

Inventor
Hiroshima, JP

Overview

2→
Patents
1989–1994
Patent span
Performing operations
Primary field (CPC B)

Patents· 2 as inventor

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

B32Bprimary
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form33%
C21DModifying the physical structure of ferrous metals33%
Y10TTechnical subjects covered by former us classification33%
PatentTitleYear
5,294,271'Heat treatment for manufacturing spring steel excellent in high-temperature relaxation resistance'19944,873,149'Vibration-damper metal sheets'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–1994Patents assigned to NISSHIN STEEL CO LTD (2)· patent assignee history
1989–1994Based in Hiroshima, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NISSHIN STEEL CO LTD21989–1994
Locations
LocationPatentsSpan
Hiroshima, JP21989–1994