Muffler with metallic meshed rings
US-2023392827-A1 · Dec 7, 2023 · US
Sound absorbing materials
Sound absorbing materials · 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 | F04C29/063 |
| Official title | {Sound absorbing materials} |
| Display label | Sound absorbing materials |
| Total patents | 75 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 6 |
| 2017 | 7 |
| 2018 | 7 |
| 2019 | 5 |
| 2020 | 8 |
| 2021 | 10 |
| 2022 | 9 |
| 2023 | 11 |
| 2024 | 3 |
| 2025 | 5 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Muffler with metallic meshed rings
US-11808490-B2 · Nov 7, 2023 · US
Package-type compressor
US-2023332603-A1 · Oct 19, 2023 · US
Motor-driven compressor, housing structure for motor-driven compressor, and method of installing soundproof cover on motor-driven compressor
US-2023296113-A1 · Sep 21, 2023 · US
Outdoor unit of air-conditioning apparatus
US-11761676-B2 · Sep 19, 2023 · US
Fluid working systems
US-11499552-B2 · Nov 15, 2022 · US
Electric compressor
US-2022307506-A1 · Sep 29, 2022 · US
Thermal and sound optimized lattice-cored additive manufactured compressor components
US-11448221-B2 · Sep 20, 2022 · US
Suction hand and industrial robot provided with the same
US-11420340-B2 · Aug 23, 2022 · US
Compressor having damped scroll
US-11353022-B2 · Jun 7, 2022 · US
Supercharger integral resonator
US-11339708-B2 · May 24, 2022 · US
Compressor Having Damped Scroll
US-2022136502-A1 · May 5, 2022 · US
Scroll compressor including a buffer member between a shaft and a recess part of an eccentric bush
US-11225966-B2 · Jan 18, 2022 · US
Silencer and ejector in which silencer is used
US-11225889-B2 · Jan 18, 2022 · US
Compressor Having Damped Scroll
US-2021372407-A1 · Dec 2, 2021 · US
Motor oil pump assembly, steering system, and vehicle
US-2021324849-A1 · Oct 21, 2021 · US
Motor-driven compressor
US-2021305879-A1 · Sep 30, 2021 · US
Screw compressor
US-11067081-B2 · Jul 20, 2021 · US
Muffler with metallic meshed rings
US-2021080151-A1 · Mar 18, 2021 · US
Heat exchanger for gas compressor
US-10920778-B2 · Feb 16, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C29/063?
- CPC F04C29/063 is the Cooperative Patent Classification code for “Sound absorbing materials.”
- How many patents are filed under CPC F04C29/063 (Sound absorbing materials)?
- Our database includes 75 publications tagged with this CPC code.
- Is patent activity under CPC F04C29/063 growing?
- Publication counts under this code: 3 in 2024 vs 5 in 2025 (latest complete years).