How many patents does Air Liquide have in patentsdb?

Air Liquide is linked to 1,883 publications as assignee in our database.

What technology areas does Air Liquide patent most?

Top mapped technology areas by patent count: Mechanical Engineering (1,025); Chemistry & Metallurgy (822); Operations & Transport (792).

In our data, assignee counts were 191 in 2024 and 135 in 2025 (lower year over year).

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

Air Liquide holds 1,883 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
Mechanical Engineering	1,025
Chemistry & Metallurgy	822
Operations & Transport	792
Cross-Sectional Technologies	699
Electricity	193
Physics	144
Human Necessities	102
Fixed Constructions	24
Textiles & Paper	7

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

How many patents does Air Liquide have in patentsdb?: Air Liquide is linked to 1,883 publications as assignee in our database.
What technology areas does Air Liquide patent most?: Top mapped technology areas by patent count: Mechanical Engineering (1,025); Chemistry & Metallurgy (822); Operations & Transport (792).
Is Air Liquide's patent activity growing?: In our data, assignee counts were 191 in 2024 and 135 in 2025 (lower year over year).
What are recent patents assigned to Air Liquide?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.