How many patents does Doosan Fuel Cell America Inc have in patentsdb?

Doosan Fuel Cell America Inc is linked to 87 publications as assignee in our database.

What technology areas does Doosan Fuel Cell America Inc patent most?

Top mapped technology areas by patent count: Cross-Sectional Technologies (86); Electricity (82); Chemistry & Metallurgy (12).

In our data, assignee counts were 2 in 2024 and 1 in 2025 (lower year over year).

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

Doosan Fuel Cell America Inc holds 87 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.

Most common classification codes in this portfolio.

Mapped technology topics for this assignee.

Company technology slices
Technology	Patents
Cross-Sectional Technologies	86
Electricity	82
Chemistry & Metallurgy	12
Mechanical Engineering	11
Operations & Transport	11
Physics	9
Fixed Constructions	1

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

How many patents does Doosan Fuel Cell America Inc have in patentsdb?: Doosan Fuel Cell America Inc is linked to 87 publications as assignee in our database.
What technology areas does Doosan Fuel Cell America Inc patent most?: Top mapped technology areas by patent count: Cross-Sectional Technologies (86); Electricity (82); Chemistry & Metallurgy (12).
Is Doosan Fuel Cell America Inc's patent activity growing?: In our data, assignee counts were 2 in 2024 and 1 in 2025 (lower year over year).
What are recent patents assigned to Doosan Fuel Cell America Inc?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.