Electroosmotic flow valve for an electronic device
US-12267641-B2 · Apr 1, 2025 · US
Other positive-displacement pumps
Other positive-displacement pumps · 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 | F04B19/20 |
| Official title | Other positive-displacement pumps |
| Display label | Other positive-displacement pumps |
| Total patents | 61 |
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 | 8 |
| 2017 | 6 |
| 2018 | 9 |
| 2019 | 9 |
| 2020 | 6 |
| 2021 | 6 |
| 2022 | 5 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Drug injection device and method
US-2025050018-A1 · Feb 13, 2025 · US
Microfluidic device and methods
US-11911763-B2 · Feb 27, 2024 · US
Pump
US-2023381409-A1 · Nov 30, 2023 · US
Electroosmotic flow valve for an electronic device
US-2023171532-A1 · Jun 1, 2023 · US
Method of making an amorphous solid for use within a non-combustible aerosol provision system
US-2023000137-A1 · Jan 5, 2023 · US
Control system and method
US-2022305495-A1 · Sep 29, 2022 · US
Solid particulate pump
US-11371494-B2 · Jun 28, 2022 · US
Fluid ejection device including recirculation system
US-11260668-B2 · Mar 1, 2022 · US
Microfluidic device and methods
US-2022055035-A1 · Feb 24, 2022 · US
Microfluidic device and methods
US-11213824-B2 · Jan 4, 2022 · US
Electrochemical hydrogen pump
US-2021285427-A1 · Sep 16, 2021 · US
Self-pumping structures and methods of using self-pumping structures
US-11041486-B2 · Jun 22, 2021 · US
Plunger pump
US-2021131426-A1 · May 6, 2021 · US
Surface for directional fluid transport including against external pressure
US-10927853-B2 · Feb 23, 2021 · US
Electrically driven compressor mounted on a vehicle engine having a weight inside to shift the resonance frequency of the compressor from that of the engine
US-10920780-B2 · Feb 16, 2021 · US
Fluid ejection device including recirculation system
US-2021023852-A1 · Jan 28, 2021 · US
Microfluidic systems
US-10807093-B2 · Oct 20, 2020 · US
Fluid ejection device including recirculation system
US-10807376-B2 · Oct 20, 2020 · US
Dispensing pump with skirt spring
US-10773269-B2 · Sep 15, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04B19/20?
- CPC F04B19/20 is the Cooperative Patent Classification code for “Other positive-displacement pumps.”
- How many patents are filed under CPC F04B19/20 (Other positive-displacement pumps)?
- Our database includes 61 publications tagged with this CPC code.
- Is patent activity under CPC F04B19/20 growing?
- Publication counts under this code: 1 in 2024 vs 2 in 2025 (latest complete years).