Reservoir-regulating digital load control
US-2026028958-A1 · Jan 29, 2026 · US
the apparatus being a pump or a compressor
the apparatus being a pump or a compressor · 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 | F03D9/28 |
| Official title | the apparatus being a pump or a compressor |
| Display label | the apparatus being a pump or a compressor |
| Total patents | 58 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 6 |
| 2017 | 4 |
| 2018 | 7 |
| 2019 | 3 |
| 2020 | 6 |
| 2021 | 3 |
| 2022 | 7 |
| 2023 | 5 |
| 2024 | 6 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Offshore wind turbine generator set having a compressed energy storage system
US-12497950-B2 · Dec 16, 2025 · US
Wind power generator
US-12404836-B2 · Sep 2, 2025 · US
Onshore wind turbine generator set having a compressed energy storage system
US-2024392749-A1 · Nov 28, 2024 · US
Offshore wind turbine generator set having a compressed energy storage system
US-2024392748-A1 · Nov 28, 2024 · US
Fluid flow energy extraction system and method related thereto
US-12152564-B2 · Nov 26, 2024 · US
Wind turbine power plant including auxiliary systems
US-2024280082-A1 · Aug 22, 2024 · US
Wind power generator
US-2024183339-A1 · Jun 6, 2024 · US
Reservoir-regulating digital load control
US-11898530-B2 · Feb 13, 2024 · US
Electronic controller with off-load and anti-stall capability for Ram air turbine variable displacement hydraulic pump
US-11820528-B2 · Nov 21, 2023 · US
Electronic controller with off-load and anti-stall capability for ram air turbine variable displacement hydraulic pump
US-2023303265-A1 · Sep 28, 2023 · US
Wind farm offshore communication system
US-2023096937-A1 · Mar 30, 2023 · US
Method and device for managing the offtake of power produced by an auxiliary power unit of an aircraft and aircraft equipped with said power offtake management device
US-11578700-B2 · Feb 14, 2023 · US
Low-speed high-torque hydrostatic powertrain
US-2023030035-A1 · Feb 2, 2023 · US
Reservoir-regulating digital load control
US-2022316437-A1 · Oct 6, 2022 · US
Supercharging system
US-2022260008-A1 · Aug 18, 2022 · US
Wind powered system to lift water using multiple tanks
US-11408397-B2 · Aug 9, 2022 · US
Mechanical pressure converter for water desalination
US-11318419-B2 · May 3, 2022 · US
Fluid flow energy extraction system and method related thereto
US-2022074384-A1 · Mar 10, 2022 · US
Method and device for managing the offtake of power produced by an auxiliary power unit of an aircraft and aircraft equipped with said power offtake management device
US-2022042492-A1 · Feb 10, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F03D9/28?
- CPC F03D9/28 is the Cooperative Patent Classification code for “the apparatus being a pump or a compressor.”
- How many patents are filed under CPC F03D9/28 (the apparatus being a pump or a compressor)?
- Our database includes 58 publications tagged with this CPC code.
- Is patent activity under CPC F03D9/28 growing?
- Publication counts under this code: 6 in 2024 vs 2 in 2025 (latest complete years).