What is CPC D06F37/28?

CPC D06F37/28 is the Cooperative Patent Classification code for “Doors; Security means therefor.”

How many patents are filed under CPC D06F37/28 (Doors; Security means therefor)?

Our database includes 609 publications tagged with this CPC code.

Publication counts under this code: 35 in 2024 vs 39 in 2025 (latest complete years).

Doors; Security means therefor · Cooperative Patent Classification (CPC)

Textile and paper production, treatment, and products.

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	D06F37/28
Official title	Doors; Security means therefor
Display label	Doors; Security means therefor
Total patents	609

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 D06F37/28?: CPC D06F37/28 is the Cooperative Patent Classification code for “Doors; Security means therefor.”
How many patents are filed under CPC D06F37/28 (Doors; Security means therefor)?: Our database includes 609 publications tagged with this CPC code.
Is patent activity under CPC D06F37/28 growing?: Publication counts under this code: 35 in 2024 vs 39 in 2025 (latest complete years).