Distributed nested cell damping system
US-2021372286-A1 · Dec 2, 2021 · US
hollowed
hollowed · 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 | F05D2250/291 |
| Official title | hollowed |
| Display label | hollowed |
| Total patents | 120 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 8 |
| 2017 | 2 |
| 2018 | 10 |
| 2019 | 9 |
| 2020 | 17 |
| 2021 | 12 |
| 2022 | 14 |
| 2023 | 18 |
| 2024 | 15 |
| 2025 | 13 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Substrate Edge Configurations for Ceramic Coatings
US-2021355838-A1 · Nov 18, 2021 · US
Stator Blade, Compressor Structure and Compressor
US-2021332829-A1 · Oct 28, 2021 · US
Improved air-sealing device intended to be inserted between an aircraft dual-flow turbine engine casing element, and a nacelle element
US-2021332762-A1 · Oct 28, 2021 · US
Substrate edge configurations for ceramic coatings
US-11131206-B2 · Sep 28, 2021 · US
Hub inlet surface for an electric motor assembly
US-2021172447-A1 · Jun 10, 2021 · US
Airfoil for a turbine engine incorporating pins
US-2021156264-A1 · May 27, 2021 · US
Composite hollow blade and a method of forming the composite hollow blade
US-11015461-B2 · May 25, 2021 · US
Fan blade attachment root with improved strain response
US-11002285-B2 · May 11, 2021 · US
Dual motor system
US-2021123442-A1 · Apr 29, 2021 · US
Centrifugal impeller for a turbine engine
US-10975881-B2 · Apr 13, 2021 · US
Rotor disk for gas turbine engine
US-10927676-B2 · Feb 23, 2021 · US
Fan blade attachment root with improved strain response
US-2020400159-A1 · Dec 24, 2020 · US
Mistuned bladed rotor and associated manufacturing method
US-10837287-B2 · Nov 17, 2020 · US
Cooling towers axial fan in a hollowed disc/ring configuration
US-10808717-B2 · Oct 20, 2020 · US
Fan blade attachment root with improved strain response
US-10801515-B2 · Oct 13, 2020 · US
Method of producing a gas turbine engine component
US-10793943-B2 · Oct 6, 2020 · US
Control rings
US-2020308976-A1 · Oct 1, 2020 · US
Turbine rotor blade assembly
US-10781700-B2 · Sep 22, 2020 · US
Turbine engine assembly with tubular locating inserts
US-10738642-B2 · Aug 11, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F05D2250/291?
- CPC F05D2250/291 is the Cooperative Patent Classification code for “hollowed.”
- How many patents are filed under CPC F05D2250/291 (hollowed)?
- Our database includes 120 publications tagged with this CPC code.
- Is patent activity under CPC F05D2250/291 growing?
- Publication counts under this code: 15 in 2024 vs 13 in 2025 (latest complete years).