How many patents does Crrc Qingdao Sifang Co Ltd have in patentsdb?

Crrc Qingdao Sifang Co Ltd is linked to 225 publications as assignee in our database.

What technology areas does Crrc Qingdao Sifang Co Ltd patent most?

Top mapped technology areas by patent count: Operations & Transport (199); Cross-Sectional Technologies (43); Electricity (42).

In our data, assignee counts were 19 in 2024 and 8 in 2025 (lower year over year).

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

Crrc Qingdao Sifang Co Ltd holds 225 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 rapidly declining.

Latest publications where this party is an assignee.

Representative or frequently cited publications from precomputed assignee stats.

Mapped technology topics for this assignee.

Company technology slices
Technology	Patents
Operations & Transport	199
Cross-Sectional Technologies	43
Electricity	42
Physics	36
Mechanical Engineering	21
Fixed Constructions	20
Chemistry & Metallurgy	6
Textiles & Paper	1

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

How many patents does Crrc Qingdao Sifang Co Ltd have in patentsdb?: Crrc Qingdao Sifang Co Ltd is linked to 225 publications as assignee in our database.
What technology areas does Crrc Qingdao Sifang Co Ltd patent most?: Top mapped technology areas by patent count: Operations & Transport (199); Cross-Sectional Technologies (43); Electricity (42).
Is Crrc Qingdao Sifang Co Ltd's patent activity growing?: In our data, assignee counts were 19 in 2024 and 8 in 2025 (lower year over year).
What are recent patents assigned to Crrc Qingdao Sifang Co Ltd?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.