How many patents does Japan Steel Works Ltd have in patentsdb?

Japan Steel Works Ltd is linked to 537 publications as assignee in our database.

What technology areas does Japan Steel Works Ltd patent most?

Top mapped technology areas by patent count: Operations & Transport (425); Electricity (154); Chemistry & Metallurgy (120).

In our data, assignee counts were 93 in 2024 and 84 in 2025 (lower year over year).

See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.

Japan Steel Works Ltd holds 537 patents in our database, with recent filings and technology areas summarized below.

Year-over-year patent counts for this assignee.

Filing activity over the last five years is growing.

Latest publications where this party is an assignee.

Representative or frequently cited publications from precomputed assignee stats.

Most common classification codes in this portfolio.

Mapped technology topics for this assignee.

Company technology slices
Technology	Patents
Operations & Transport	425
Electricity	154
Chemistry & Metallurgy	120
Cross-Sectional Technologies	80
Physics	68
Mechanical Engineering	28
Textiles & Paper	12

Answers are generated from the same data shown on this page.

How many patents does Japan Steel Works Ltd have in patentsdb?: Japan Steel Works Ltd is linked to 537 publications as assignee in our database.
What technology areas does Japan Steel Works Ltd patent most?: Top mapped technology areas by patent count: Operations & Transport (425); Electricity (154); Chemistry & Metallurgy (120).
Is Japan Steel Works Ltd's patent activity growing?: In our data, assignee counts were 93 in 2024 and 84 in 2025 (lower year over year).
What are recent patents assigned to Japan Steel Works Ltd?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.