Switchable Apparatus, Well Site and Control Method Thereof, Device, and Storage Medium
US-2023220757-A1 · Jul 13, 2023 · US
Combinations of two or more machines or engines (F01D15/00 takes precedence; combinations of two or more pumps F04; fluid gearing F16H)
Combinations of two or more machines or engines (F01D15/00 takes precedence; combinations of two or more pumps F04; fluid gearing F16H) · 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 | F01D13/00 |
| Official title | Combinations of two or more machines or engines (F01D15/00 takes precedence; combinations of two or more pumps F04; fluid gearing F16H) |
| Display label | Combinations of two or more machines or engines (F01D15/00 takes precedence; combinations of two or more pumps F04; fluid gearing F16H) |
| Total patents | 70 |
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 | 5 |
| 2017 | 7 |
| 2018 | 9 |
| 2019 | 7 |
| 2020 | 11 |
| 2021 | 6 |
| 2022 | 5 |
| 2023 | 6 |
| 2024 | 7 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Multi-stage pump or turbine for controlling fluids with significant variations in gas fraction
US-11655822-B1 · May 23, 2023 · US
Switchable apparatus, well site and control method thereof, device, and storage medium
US-11608726-B2 · Mar 21, 2023 · US
Architecture for a propulsion system of a helicopter including a hybrid turboshaft engine and a system for reactivating said hybrid turboshaft engine
US-11597504-B2 · Mar 7, 2023 · US
Method for coupling a hydroelectric power plant to the grid comprising at least two hydroelectric units
US-2023010493-A1 · Jan 12, 2023 · US
Bearing preload using external gearbox reaction
US-11434784-B2 · Sep 6, 2022 · US
Combined power generation plant and combined power generation plant control method
US-11415078-B2 · Aug 16, 2022 · US
Switchable apparatus, well site and control method thereof, device, and storage medium
US-2022220836-A1 · Jul 14, 2022 · US
Low nitrogen coupling combustion system for the disposal of waste stink gas and solid waste
US-2022146095-A1 · May 12, 2022 · US
Architecture for a propulsion system of a helicopter including a hybrid turboshaft engine and a system for reactivating said hybrid turboshaft engine
US-2022024568-A1 · Jan 27, 2022 · US
System configuration and operation method for improving steam turbine power generation efficiency
US-11187103-B2 · Nov 30, 2021 · US
Architecture for a propulsion system of a helicopter including a hybrid turboshaft engine and a system for reactivating said hybrid turboshaft engine
US-11161603-B2 · Nov 2, 2021 · US
Combined power generation plant and combined power generation plant control method
US-2021285396-A1 · Sep 16, 2021 · US
Systems and methods for starting an engine
US-10961915-B2 · Mar 30, 2021 · US
Bearing preload using external gearbox reaction
US-2021078720-A1 · Mar 18, 2021 · US
Stability margin and clearance control using power extraction and assist of a gas turbine engine
US-10934972-B2 · Mar 2, 2021 · US
Air system of multi-engine aircraft
US-2020378317-A1 · Dec 3, 2020 · US
Propulsion assembly for an aircraft, comprising a gas generator, two offset fans and an air inlet sleeve
US-10814989-B2 · Oct 27, 2020 · US
Fan drive gear system electrical conditioning circuit for hybrid electric gas turbine engine
US-10801443-B2 · Oct 13, 2020 · US
Aircraft system
US-10752375-B2 · Aug 25, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01D13/00?
- CPC F01D13/00 is the Cooperative Patent Classification code for “Combinations of two or more machines or engines (F01D15/00 takes precedence; combinations of two or more pumps F04; fluid gearing F16H).”
- How many patents are filed under CPC F01D13/00 (Combinations of two or more machines or engines (F01D15/00 takes precedence; combinations of two or more pumps F04; fluid gearing F16H))?
- Our database includes 70 publications tagged with this CPC code.
- Is patent activity under CPC F01D13/00 growing?
- Publication counts under this code: 7 in 2024 vs 2 in 2025 (latest complete years).