What is CPC H02K9/02?

CPC H02K9/02 is the Cooperative Patent Classification code for “by ambient air flowing through the machine.”

How many patents are filed under CPC H02K9/02 (by ambient air flowing through the machine)?

Our database includes 480 publications tagged with this CPC code.

Publication counts under this code: 33 in 2024 vs 26 in 2025 (latest complete years).

by ambient air flowing through the machine · Cooperative Patent Classification (CPC)

Electric circuits, power, telecommunications, and semiconductors.

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	H02K9/02
Official title	by ambient air flowing through the machine
Display label	by ambient air flowing through the machine
Total patents	480

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

Filing activity over the last five years is 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 H02K9/02?: CPC H02K9/02 is the Cooperative Patent Classification code for “by ambient air flowing through the machine.”
How many patents are filed under CPC H02K9/02 (by ambient air flowing through the machine)?: Our database includes 480 publications tagged with this CPC code.
Is patent activity under CPC H02K9/02 growing?: Publication counts under this code: 33 in 2024 vs 26 in 2025 (latest complete years).