Fuel cell
US-9496568-B2 · Nov 15, 2016 · US
Regulation of differential pressures
Regulation of differential pressures · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01M8/04104 |
| Official title | {Regulation of differential pressures} |
| Display label | Regulation of differential pressures |
| Total patents | 494 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 32 |
| 2016 | 62 |
| 2017 | 37 |
| 2018 | 49 |
| 2019 | 51 |
| 2020 | 42 |
| 2021 | 50 |
| 2022 | 51 |
| 2023 | 42 |
| 2024 | 42 |
| 2025 | 29 |
| 2026 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Driving control method and system of fuel cell system
US-9484586-B2 · Nov 1, 2016 · US
System and method for reducing fuel cell power plant emissions
US-9444110-B2 · Sep 13, 2016 · US
Fuel cell assembly
US-9406966-B2 · Aug 2, 2016 · US
Method for Controlling Pressure
US-2016218383-A1 · Jul 28, 2016 · US
Method for changing a fuel cell system over to a standby mode as well as such a fuel cell system
US-2016204456-A1 · Jul 14, 2016 · US
Fuel cell apparatus and method for downhole power systems
US-2016201436-A1 · Jul 14, 2016 · US
Fuel cell system and method for controlling fuel cell system
US-2016197367-A1 · Jul 7, 2016 · US
Fluidic components suitable for fuel cell systems including pressure regulators and valves
US-2016190612-A1 · Jun 30, 2016 · US
Open-loop system and method for fuel cell stack start-up with low-voltage source
US-2016181636-A1 · Jun 23, 2016 · US
Fuel supply apparatus
US-2016161005-A1 · Jun 9, 2016 · US
Fuel cell system and method for controlling fuel cell system
US-9356302-B2 · May 31, 2016 · US
Fuel cell system, fuel cell-mounted vehicle and method of controlling fuel system
US-2016141687-A1 · May 19, 2016 · US
Valve control apparatus and valve control method
US-2016139614-A1 · May 19, 2016 · US
Fuel cell system, movable body, and control method
US-2016141683-A1 · May 19, 2016 · US
Fuel cell system and vehicle equipped with fuel cell
US-2016133962-A1 · May 12, 2016 · US
Pressure reducing valve
US-2016118676-A1 · Apr 28, 2016 · US
Fuel cell system
US-2016111736-A1 · Apr 21, 2016 · US
Valve device
US-2016104903-A1 · Apr 14, 2016 · US
Fuel cell apparatus and method for downhole power systems
US-9312557-B2 · Apr 12, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01M8/04104?
- CPC H01M8/04104 is the Cooperative Patent Classification code for “Regulation of differential pressures.”
- How many patents are filed under CPC H01M8/04104 (Regulation of differential pressures)?
- Our database includes 494 publications tagged with this CPC code.
- Is patent activity under CPC H01M8/04104 growing?
- Publication counts under this code: 42 in 2024 vs 29 in 2025 (latest complete years).