Oil-injected multistage compressor device and method for controlling such a compressor device
US-11371507-B2 · Jun 28, 2022 · US
with two cylinders
with two cylinders · 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 | F04B25/005 |
| Official title | {with two cylinders} |
| Display label | with two cylinders |
| Total patents | 83 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 7 |
| 2017 | 6 |
| 2018 | 7 |
| 2019 | 6 |
| 2020 | 14 |
| 2021 | 14 |
| 2022 | 8 |
| 2023 | 7 |
| 2024 | 6 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Reciprocating-piston machine, compressed air supply system, vehicle and method for producing a reciprocating-piston machine
US-2021404458-A1 · Dec 30, 2021 · US
Air compressor
US-11193477-B2 · Dec 7, 2021 · US
Piston compressor
US-2021372384-A1 · Dec 2, 2021 · US
Variable-Pressure Air Pump
US-2021364013-A1 · Nov 25, 2021 · US
Pump having multi-stage gas compression
US-2021355929-A1 · Nov 18, 2021 · US
Variable capacity compressor operation mode determination method and device, variable capacity compressor, and air conditioner
US-2021340977-A1 · Nov 4, 2021 · US
Membrane heat exchanger system and method
US-11143467-B2 · Oct 12, 2021 · US
Double-piston compressor of a compressed air supply device
US-2021293229-A1 · Sep 23, 2021 · US
Three-stage compression air pump
US-2021254610-A1 · Aug 19, 2021 · US
Vacuum transport tube vehicle, system, and method for evacuating a vacuum transport tube
US-11091175-B2 · Aug 17, 2021 · US
Oil-injected multistage compressor device and method for controlling such a compressor device
US-2021246900-A1 · Aug 12, 2021 · US
Gas leak determining method, and multi-stage compressor
US-11085430-B2 · Aug 10, 2021 · US
Heat exchanger array system and method for an air thermal conditioner
US-2021215445-A1 · Jul 15, 2021 · US
Method for operating a pressure control system comprising a multi-stage compressor, and pressure control system
US-10961999-B2 · Mar 30, 2021 · US
Cooling Block For Multi-Cylinder Air Compressor
US-2020392951-A1 · Dec 17, 2020 · US
Reciprocating compressor having first and second cylinders in selective fluid communication with respective first and second suction plenums
US-10815979-B2 · Oct 27, 2020 · US
Variable pressure air pump
US-10815981-B2 · Oct 27, 2020 · US
Air compressor
US-2020325890-A1 · Oct 15, 2020 · US
Method for operating a piston compressor, and piston compressor
US-2020309116-A1 · Oct 1, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B25/005?
- CPC F04B25/005 is the Cooperative Patent Classification code for “with two cylinders.”
- How many patents are filed under CPC F04B25/005 (with two cylinders)?
- Our database includes 83 publications tagged with this CPC code.
- Is patent activity under CPC F04B25/005 growing?
- Publication counts under this code: 6 in 2024 vs 3 in 2025 (latest complete years).