Hydraulic unit
US-2024263652-A1 · Aug 8, 2024 · 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 | F04B23/02 |
| Official title | — |
| Display label | Mechanical Engineering (mapped technology topic) |
| Total patents | 568 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 19 |
| 2016 | 26 |
| 2017 | 44 |
| 2018 | 48 |
| 2019 | 49 |
| 2020 | 54 |
| 2021 | 56 |
| 2022 | 63 |
| 2023 | 76 |
| 2024 | 57 |
| 2025 | 57 |
| 2026 | 19 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Diaphragm Pump
US-2024093682-A1 · Mar 21, 2024 · US
Weight training apparatus
US-2024009502-A1 · Jan 11, 2024 · US
Power frame and lubrication system for a reciprocating pump assembly
US-2017370524-A1 · Dec 28, 2017 · US
Powder supply by means of a dense flux pump for a coating system
US-9815074-B2 · Nov 14, 2017 · US
Recirculating cooling systems for use with energy delivery devices
US-2017319275-A1 · Nov 9, 2017 · US
Rod pumping unit and method of operation
US-2017298925-A1 · Oct 19, 2017 · US
Pump device and tilt and trim device for outboard machine
US-9784267-B2 · Oct 10, 2017 · US
System and method for a compressor
US-9771933-B2 · Sep 26, 2017 · US
Three Piece Pump
US-2017266680-A1 · Sep 21, 2017 · US
Manually Actuatable Feed Pump and Fuel System with a Feed Pump
US-2017167458-A1 · Jun 15, 2017 · US
System and method for a compressor
US-9677556-B2 · Jun 13, 2017 · US
Compressed air storage and power generation device and compressed air storage and power generation method
US-2017159649-A1 · Jun 8, 2017 · US
Plural component pumping system
US-9670919-B2 · Jun 6, 2017 · US
Method of Operating Cryogenic Pump and Cryogenic Pump System
US-2017002800-A1 · Jan 5, 2017 · US
Hydraulic Drive Multi-Element Cryogenic Pump
US-2016377068-A1 · Dec 29, 2016 · US
Liquid delivery pump
US-2016369793-A1 · Dec 22, 2016 · US
Liquid supply mechanism and liquid cooling system
US-2016366788-A1 · Dec 15, 2016 · US
Portable airless sprayer
US-9517479-B2 · Dec 13, 2016 · US
Liquid supply device and liquid cooling system
US-2016338224-A1 · Nov 17, 2016 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B23/02?
- CPC F04B23/02 is the Cooperative Patent Classification code for “Mechanical Engineering.”
- How many patents are filed under CPC F04B23/02 (Mechanical Engineering)?
- Our database includes 568 publications tagged with this CPC code.
- Is patent activity under CPC F04B23/02 growing?
- Publication counts under this code: 57 in 2024 vs 57 in 2025 (latest complete years).