Auto-release vacuum device
US-9833910-B2 · Dec 5, 2017 · US
Mechanical Engineering
Mechanical Engineering · 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 | F04F5/20 |
| Official title | — |
| Display label | Mechanical Engineering (mapped technology topic) |
| Total patents | 249 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 26 |
| 2016 | 26 |
| 2017 | 27 |
| 2018 | 34 |
| 2019 | 25 |
| 2020 | 29 |
| 2021 | 20 |
| 2022 | 20 |
| 2023 | 13 |
| 2024 | 17 |
| 2025 | 11 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Evacuator system having multi-port evacuator
US-9828953-B2 · Nov 28, 2017 · US
Humidifying apparatus
US-9752789-B2 · Sep 5, 2017 · US
Installation for producing nitric acid with a sealing device for sealing a rotatable shaft of a no compressor and/or of a residual gas expander
US-2017227129-A1 · Aug 10, 2017 · US
Fan with a filter
US-2017138374-A1 · May 18, 2017 · US
Venturi devices resistant to ice formation for producing vacuum from crankcase gases
US-2017122153-A1 · May 4, 2017 · US
Humidifying apparatus
US-9599356-B2 · Mar 21, 2017 · US
Noise attenuation in a check valve unit or apparatus for producing vacuum
US-9534704-B2 · Jan 3, 2017 · US
Ejector
US-2016348948-A1 · Dec 1, 2016 · US
Device and method for generating vacuum for vacuum cementing systems
US-9470245-B2 · Oct 18, 2016 · US
Devices for producing vacuum using the venturi effect
US-2016298656-A1 · Oct 13, 2016 · US
Fluid pumping system and a fluid turbine system including the fluid pumping system
US-9447795-B2 · Sep 20, 2016 · US
Devices for producing vacuum using the venturi effect
US-2016265557-A1 · Sep 15, 2016 · US
Override For An Automatic Release Vacuum Device
US-2016258472-A1 · Sep 8, 2016 · US
Evacuator with motive fin
US-2016245236-A1 · Aug 25, 2016 · US
Fan
US-2016238026-A1 · Aug 18, 2016 · US
Vacuum distillation method for easily polymerizable compound and method for producing acrylic acid
US-2016237017-A1 · Aug 18, 2016 · US
Fan assembly
US-9410711-B2 · Aug 9, 2016 · US
Ejector
US-2016186783-A1 · Jun 30, 2016 · US
Evacuator system having multi-port evacuator
US-2016153472-A1 · Jun 2, 2016 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04F5/20?
- CPC F04F5/20 is the Cooperative Patent Classification code for “Mechanical Engineering.”
- How many patents are filed under CPC F04F5/20 (Mechanical Engineering)?
- Our database includes 249 publications tagged with this CPC code.
- Is patent activity under CPC F04F5/20 growing?
- Publication counts under this code: 17 in 2024 vs 11 in 2025 (latest complete years).