Discharge tongues (F04D17/04 takes precedence)

Discharge tongues (F04D17/04 takes precedence) · Cooperative Patent Classification (CPC)

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

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeF04D29/428
Official title{Discharge tongues (F04D17/04 takes precedence)}
Display labelDischarge tongues (F04D17/04 takes precedence)
Total patents43

Filing trend

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

Filing activity over the last five years is declining.

Patents filed per year
YearPatents
20158
20166
20174
20187
20191
20205
20212
20222
20233
20244
20251

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 F04D29/428?
CPC F04D29/428 is the Cooperative Patent Classification code for “Discharge tongues (F04D17/04 takes precedence).”
How many patents are filed under CPC F04D29/428 (Discharge tongues (F04D17/04 takes precedence))?
Our database includes 43 publications tagged with this CPC code.
Is patent activity under CPC F04D29/428 growing?
Publication counts under this code: 4 in 2024 vs 1 in 2025 (latest complete years).