Vacuum pump with noise attenuating passage
US-10851788-B2 · Dec 1, 2020 · US
Noise
Noise · 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 | F04C2270/13 |
| Official title | Noise |
| Display label | Noise |
| Total patents | 114 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 15 |
| 2016 | 8 |
| 2017 | 16 |
| 2018 | 9 |
| 2019 | 5 |
| 2020 | 7 |
| 2021 | 10 |
| 2022 | 7 |
| 2023 | 11 |
| 2024 | 17 |
| 2025 | 9 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Rotary-type compressor
US-10851782-B2 · Dec 1, 2020 · US
Compressor, refrigeration cycle apparatus, and air conditioner
US-10739046-B2 · Aug 11, 2020 · US
Vacuum pump with noise attenuating passage
US-2020200178-A1 · Jun 25, 2020 · US
Compressor having sound isolation feature
US-10570901-B2 · Feb 25, 2020 · US
Fluid compressor
US-2020032797-A1 · Jan 30, 2020 · US
Compressor having sound isolation feature
US-10544786-B2 · Jan 28, 2020 · US
Electric compressor
US-2019360734-A1 · Nov 28, 2019 · US
Compressor having a sleeve guide assembly
US-10458409-B2 · Oct 29, 2019 · US
Compressor having external shell with vibration isolation and pressure balance
US-10240603-B2 · Mar 26, 2019 · US
Conduction noise filtering circuit, inverting device, and compressor
US-10177702-B2 · Jan 8, 2019 · US
Oil pump having extension portions that reduce the effect of #the collapse of bubbles in the oil
US-10174757-B2 · Jan 8, 2019 · US
Elastomer series coupling damper for supercharger
US-2018347661-A1 · Dec 6, 2018 · US
Balance shaft module
US-10107287-B2 · Oct 23, 2018 · US
Bearing plate noise damper
US-2018274542-A1 · Sep 27, 2018 · US
Noise-reduction mechanism for oil pump
US-9989059-B2 · Jun 5, 2018 · US
Pump device
US-2018149153-A1 · May 31, 2018 · US
Vane oil pump
US-9920666-B2 · Mar 20, 2018 · US
Pump apparatus and marine vessel propelling machine
US-9885355-B2 · Feb 6, 2018 · US
Gerotor pump for a vehicle
US-9879672-B2 · Jan 30, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C2270/13?
- CPC F04C2270/13 is the Cooperative Patent Classification code for “Noise.”
- How many patents are filed under CPC F04C2270/13 (Noise)?
- Our database includes 114 publications tagged with this CPC code.
- Is patent activity under CPC F04C2270/13 growing?
- Publication counts under this code: 17 in 2024 vs 9 in 2025 (latest complete years).