How many patents does Toyo Seikan Group Holdings Ltd have in patentsdb?

Toyo Seikan Group Holdings Ltd is linked to 531 publications as assignee in our database.

What technology areas does Toyo Seikan Group Holdings Ltd patent most?

Top mapped technology areas by patent count: Operations & Transport (332); Chemistry & Metallurgy (323); Cross-Sectional Technologies (87).

In our data, assignee counts were 34 in 2024 and 38 in 2025 (higher year over year).

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

Toyo Seikan Group Holdings Ltd holds 531 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 stable.

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	332
Chemistry & Metallurgy	323
Cross-Sectional Technologies	87
Physics	70
Human Necessities	56
Electricity	52
Fixed Constructions	13
Mechanical Engineering	9
Textiles & Paper	2

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

How many patents does Toyo Seikan Group Holdings Ltd have in patentsdb?: Toyo Seikan Group Holdings Ltd is linked to 531 publications as assignee in our database.
What technology areas does Toyo Seikan Group Holdings Ltd patent most?: Top mapped technology areas by patent count: Operations & Transport (332); Chemistry & Metallurgy (323); Cross-Sectional Technologies (87).
Is Toyo Seikan Group Holdings Ltd's patent activity growing?: In our data, assignee counts were 34 in 2024 and 38 in 2025 (higher year over year).
What are recent patents assigned to Toyo Seikan Group Holdings Ltd?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.