Coating for reducing friction in a reciprocating assembly
US-2024191710-A1 · Jun 13, 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 | F04B9/02 |
| Official title | — |
| Display label | Mechanical Engineering (mapped technology topic) |
| Total patents | 502 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 33 |
| 2016 | 21 |
| 2017 | 36 |
| 2018 | 40 |
| 2019 | 37 |
| 2020 | 35 |
| 2021 | 66 |
| 2022 | 55 |
| 2023 | 65 |
| 2024 | 54 |
| 2025 | 49 |
| 2026 | 11 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Pump assembly with electric starter
US-2017350386-A1 · Dec 7, 2017 · US
Electric drive system for a pulseless positive displacement pump
US-9784265-B2 · Oct 10, 2017 · US
Method of pulselessly displacing fluid
US-2017191474-A1 · Jul 6, 2017 · US
Portable working machine
US-9644618-B2 · May 9, 2017 · US
Rotation/translation converter gear unit
US-2017030445-A1 · Feb 2, 2017 · US
Liquid delivery pump
US-2016369793-A1 · Dec 22, 2016 · US
Active suspension apparatus for vehicle and pump thereof
US-9522587-B2 · Dec 20, 2016 · US
Liquid supply mechanism and liquid cooling system
US-2016366788-A1 · Dec 15, 2016 · US
Liquid supply device
US-2016333870-A1 · Nov 17, 2016 · US
A fluid pump
US-2016290325-A1 · Oct 6, 2016 · US
Air ducting shroud for cooling an air compressor pump and motor
US-9458845-B2 · Oct 4, 2016 · US
Oscillating linear actuator
US-9439497-B2 · Sep 13, 2016 · US
Rotary cabonator
US-9440836-B2 · Sep 13, 2016 · US
Pump for integrated brake system
US-2016251007-A1 · Sep 1, 2016 · US
Fluid delivery device, transcutaneous access tool and fluid drive mechanism for use therewith
US-9402950-B2 · Aug 2, 2016 · US
System and method for a pump with onboard electronics
US-9399989-B2 · Jul 26, 2016 · US
Rotary Cabonator
US-2016152460-A9 · Jun 2, 2016 · US
Pump assembly
US-2016138579-A1 · May 19, 2016 · US
Pulseless positive displacement pump and method of pulselessly displacing fluid
US-2016108904-A1 · Apr 21, 2016 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B9/02?
- CPC F04B9/02 is the Cooperative Patent Classification code for “Mechanical Engineering.”
- How many patents are filed under CPC F04B9/02 (Mechanical Engineering)?
- Our database includes 502 publications tagged with this CPC code.
- Is patent activity under CPC F04B9/02 growing?
- Publication counts under this code: 54 in 2024 vs 49 in 2025 (latest complete years).