Blower and method for decreasing eddy noise
US-9790961-B2 · Oct 17, 2017 · US
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.
| Metric | Value |
|---|---|
| CPC code | F04D29/422 |
| Official title | {Discharge tongues (F04D17/04 takes precedence)} |
| Display label | Discharge tongues (F04D17/04 takes precedence) |
| Total patents | 272 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 25 |
| 2016 | 28 |
| 2017 | 16 |
| 2018 | 26 |
| 2019 | 28 |
| 2020 | 29 |
| 2021 | 32 |
| 2022 | 28 |
| 2023 | 24 |
| 2024 | 22 |
| 2025 | 12 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Devices and methods for reducing noise in a blower housing
US-9765796-B2 · Sep 19, 2017 · US
Ventilation device provided with a volute-shaped casing
US-9745983-B2 · Aug 29, 2017 · US
Compressor of an exhaust-gas turbocharger
US-9726198-B2 · Aug 8, 2017 · US
Method for producing compressor housing
US-2017151608-A1 · Jun 1, 2017 · US
Blower fan
US-9599122-B2 · Mar 21, 2017 · US
Edge-free blower cooling interface
US-2017051750-A1 · Feb 23, 2017 · US
Compressor stage of a turbocharger with flow amplifier
US-9528431-B2 · Dec 27, 2016 · US
Centrifugal fan with dual outlets in the same direction and fan frame thereof
US-2016369811-A1 · Dec 22, 2016 · US
Fan
US-9523373-B2 · Dec 20, 2016 · US
Blower with intake closure
US-2016353951-A1 · Dec 8, 2016 · US
High efficiency furnace/air handler blower housing with a side wall having an exponentially increasing expansion angle
US-9513029-B2 · Dec 6, 2016 · US
Centrifugal blower and vehicle air conditioner provided with the same
US-9470241-B2 · Oct 18, 2016 · US
Air blowing device
US-9435350-B2 · Sep 6, 2016 · US
Vehicle air-conditioning apparatus
US-2016229262-A1 · Aug 11, 2016 · US
Controlling turbocharger compressor choke
US-2016230651-A1 · Aug 11, 2016 · US
Compressor
US-2016230775-A1 · Aug 11, 2016 · US
Blower assembly for a vehicle
US-2016208816-A1 · Jul 21, 2016 · US
Blower assembly for a vehicle
US-2016208817-A1 · Jul 21, 2016 · US
Centrifugal Fan and an Electronic Device Having the Same
US-2016209893-A1 · Jul 21, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D29/422?
- CPC F04D29/422 is the Cooperative Patent Classification code for “Discharge tongues (F04D17/04 takes precedence).”
- How many patents are filed under CPC F04D29/422 (Discharge tongues (F04D17/04 takes precedence))?
- Our database includes 272 publications tagged with this CPC code.
- Is patent activity under CPC F04D29/422 growing?
- Publication counts under this code: 22 in 2024 vs 12 in 2025 (latest complete years).