Positively-acting mechanical devices

Positively-acting mechanical devices · Cooperative Patent Classification (CPC)

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

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeB65H31/18
Official titlePositively-acting mechanical devices
Display labelPositively-acting mechanical devices
Total patents86

Filing trend

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

Filing activity over the last five years is rapidly declining.

Patents filed per year
YearPatents
201512
201610
201713
201814
20198
20202
20217
20225
20235
20248
20251
20261

Representative patents

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

Frequently asked questions

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

What is CPC B65H31/18?
CPC B65H31/18 is the Cooperative Patent Classification code for “Positively-acting mechanical devices.”
How many patents are filed under CPC B65H31/18 (Positively-acting mechanical devices)?
Our database includes 86 publications tagged with this CPC code.
Is patent activity under CPC B65H31/18 growing?
Publication counts under this code: 8 in 2024 vs 1 in 2025 (latest complete years).