How many patents does Seiren Co Ltd have in patentsdb?

Seiren Co Ltd is linked to 131 publications as assignee in our database.

What technology areas does Seiren Co Ltd patent most?

Top mapped technology areas by patent count: Operations & Transport (97); Textiles & Paper (75); Cross-Sectional Technologies (18).

In our data, assignee counts were 6 in 2024 and 9 in 2025 (higher year over year).

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

Seiren Co Ltd holds 131 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 declining.

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	97
Textiles & Paper	75
Cross-Sectional Technologies	18
Chemistry & Metallurgy	16
Electricity	15
Physics	13
Human Necessities	8
Mechanical Engineering	2

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

How many patents does Seiren Co Ltd have in patentsdb?: Seiren Co Ltd is linked to 131 publications as assignee in our database.
What technology areas does Seiren Co Ltd patent most?: Top mapped technology areas by patent count: Operations & Transport (97); Textiles & Paper (75); Cross-Sectional Technologies (18).
Is Seiren Co Ltd's patent activity growing?: In our data, assignee counts were 6 in 2024 and 9 in 2025 (higher year over year).
What are recent patents assigned to Seiren Co Ltd?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.