What is CPC B43K21/22?

CPC B43K21/22 is the Cooperative Patent Classification code for “Writing-cores gripping means, e.g. chucks.”

How many patents are filed under CPC B43K21/22 (Writing-cores gripping means, e.g. chucks)?

Our database includes 36 publications tagged with this CPC code.

Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).

Writing-cores gripping means, e.g. chucks · Cooperative Patent Classification (CPC)

Separating, mixing, shaping, printing, and transporting materials.

Mapped technology topics for this CPC code.

CPC classification statistics
Metric	Value
CPC code	B43K21/22
Official title	Writing-cores gripping means, e.g. chucks
Display label	Writing-cores gripping means, e.g. chucks
Total patents	36

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 B43K21/22?: CPC B43K21/22 is the Cooperative Patent Classification code for “Writing-cores gripping means, e.g. chucks.”
How many patents are filed under CPC B43K21/22 (Writing-cores gripping means, e.g. chucks)?: Our database includes 36 publications tagged with this CPC code.
Is patent activity under CPC B43K21/22 growing?: Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).