What is CPC F23D11/408?

CPC F23D11/408 is the Cooperative Patent Classification code for “Flow influencing devices in the air tube.”

How many patents are filed under CPC F23D11/408 (Flow influencing devices in the air tube)?

Our database includes 25 publications tagged with this CPC code.

Publication counts under this code: 1 in 2023 vs 1 in 2025 (latest complete years).

Flow influencing devices in the air tube · Cooperative Patent Classification (CPC)

Engines, pumps, lighting, heating, and mechanical systems.

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	F23D11/408
Official title	{Flow influencing devices in the air tube}
Display label	Flow influencing devices in the air tube
Total patents	25

Year-over-year patent counts classified under this CPC code.

Filing activity over the last five years is rapidly declining.

Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.

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

What is CPC F23D11/408?: CPC F23D11/408 is the Cooperative Patent Classification code for “Flow influencing devices in the air tube.”
How many patents are filed under CPC F23D11/408 (Flow influencing devices in the air tube)?: Our database includes 25 publications tagged with this CPC code.
Is patent activity under CPC F23D11/408 growing?: Publication counts under this code: 1 in 2023 vs 1 in 2025 (latest complete years).