Electric compressor
US-10119542-B2 · Nov 6, 2018 · US
Silencing (gas-flow silencers or exhaust apparatus for machines or engines in general F01N)
Silencing (gas-flow silencers or exhaust apparatus for machines or engines in general F01N) · 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 | F04C29/06 |
| Official title | Silencing (gas-flow silencers or exhaust apparatus for machines or engines in general F01N) |
| Display label | Silencing (gas-flow silencers or exhaust apparatus for machines or engines in general F01N) |
| Total patents | 325 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 22 |
| 2016 | 15 |
| 2017 | 20 |
| 2018 | 27 |
| 2019 | 31 |
| 2020 | 32 |
| 2021 | 35 |
| 2022 | 33 |
| 2023 | 33 |
| 2024 | 33 |
| 2025 | 38 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Pulsation damper for compressors
US-2018094629-A1 · Apr 5, 2018 · US
Electric compressor
US-2018023568-A1 · Jan 25, 2018 · US
Compressor Having A Sleeve Guide Assembly
US-2017350396-A1 · Dec 7, 2017 · US
Sliding Vane Type Compressor and Exhaust Structure Thereof
US-2017342982-A1 · Nov 30, 2017 · US
Rotary pump having a casing being formed with a communicating hole communicating a space that is between the side plate and the wall surface of the driving machine
US-2017284398-A1 · Oct 5, 2017 · US
Compressor
US-2017284397-A1 · Oct 5, 2017 · US
Sound enclosure for a compressor
US-9777944-B2 · Oct 3, 2017 · US
Exhaust bearing seat, screw compressor and air-conditioning unit
US-2017276137-A1 · Sep 28, 2017 · US
Compressor having sound control system
US-2017241442-A1 · Aug 24, 2017 · US
Lubrication reservoir and recirculation arrangement for scroll compressor bearing
US-9739279-B2 · Aug 22, 2017 · US
Muffler for air-conditioning apparatus and air-conditioning apparatus including the same
US-2017234552-A1 · Aug 17, 2017 · US
Supercharger Outlet Resonator
US-2017204881-A1 · Jul 20, 2017 · US
Rotary pump having a casing being formed with a communicating hole communicating a space that is between the side plate and the wall surface of the driving machine
US-9709057-B2 · Jul 18, 2017 · US
Thermal and sound optimized lattice-cored additive manufactured compressor components
US-2017184108-A1 · Jun 29, 2017 · US
Rotary compressor
US-2017175742-A1 · Jun 22, 2017 · US
Scroll-type compressor with gas passage formed in orbiting plate to restrict flow from compression chamber to back pressure chamber
US-9624928-B2 · Apr 18, 2017 · US
Electric compressor
US-2017100984-A1 · Apr 13, 2017 · US
Low noise control algorithm for hydraulic systems
US-2017074297-A1 · Mar 16, 2017 · US
Rotary compressor
US-2017074269-A1 · Mar 16, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C29/06?
- CPC F04C29/06 is the Cooperative Patent Classification code for “Silencing (gas-flow silencers or exhaust apparatus for machines or engines in general F01N).”
- How many patents are filed under CPC F04C29/06 (Silencing (gas-flow silencers or exhaust apparatus for machines or engines in general F01N))?
- Our database includes 325 publications tagged with this CPC code.
- Is patent activity under CPC F04C29/06 growing?
- Publication counts under this code: 33 in 2024 vs 38 in 2025 (latest complete years).