Fuel cell system
US-2016380289-A1 · Dec 29, 2016 · US
of fuel cell stacks
of fuel cell stacks · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01M8/04649 |
| Official title | {of fuel cell stacks} |
| Display label | of fuel cell stacks |
| Total patents | 296 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 24 |
| 2016 | 37 |
| 2017 | 31 |
| 2018 | 28 |
| 2019 | 42 |
| 2020 | 19 |
| 2021 | 27 |
| 2022 | 27 |
| 2023 | 19 |
| 2024 | 15 |
| 2025 | 26 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Impedance measuring device for laminated battery
US-9529055-B2 · Dec 27, 2016 · US
Fuel Cell Vehicle
US-2016347200-A1 · Dec 1, 2016 · US
Fuel cell system and control method for fuel cell system
US-2016351928-A1 · Dec 1, 2016 · US
Apparatus for diagnosing a state of a fuel cell stack and method thereof
US-9494655-B2 · Nov 15, 2016 · US
Method for diagnosing fault of fuel cell stack
US-9461321-B2 · Oct 4, 2016 · US
Electrochemical impedance spectroscopy (EIS) analyzer and method of using thereof
US-9461319-B2 · Oct 4, 2016 · US
Structure and method for fuel cell system where multiple fuel cells and power electronics feed loads in parallel allowing for integrated electrochemical impedance spectroscopy (EIS)
US-9461320-B2 · Oct 4, 2016 · US
System and method for fuel cell degradation management
US-9455461-B2 · Sep 27, 2016 · US
Impedance measuring device and control method for impedance measuring device
US-9450259-B2 · Sep 20, 2016 · US
Method for diagnosing fault of fuel cell stack
US-9435865-B2 · Sep 6, 2016 · US
System reference with compensation of electrical and mechanical stress and life-time drift effects
US-2016238647-A1 · Aug 18, 2016 · US
Anode bleed control in a fuel cell stack
US-2016240875-A1 · Aug 18, 2016 · US
Method for generating injected current of fuel cell stack
US-9385383-B2 · Jul 5, 2016 · US
Fuel cell system and method of controlling operation of fuel cell
US-2016190613-A1 · Jun 30, 2016 · US
Method and apparatus for diagnosing fault within fuel cell stack
US-9373860-B2 · Jun 21, 2016 · US
Apparatus and method for measuring impedance for fuel cell diagnosis
US-2016169979-A1 · Jun 16, 2016 · US
Internal resistance measurement device and method for stacked battery
US-9366731-B2 · Jun 14, 2016 · US
Fuel cell system and moving body using the fuel cell system
US-9368811-B2 · Jun 14, 2016 · US
Fuel cell system and control method of fuel cell system
US-2016156046-A1 · Jun 2, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01M8/04649?
- CPC H01M8/04649 is the Cooperative Patent Classification code for “of fuel cell stacks.”
- How many patents are filed under CPC H01M8/04649 (of fuel cell stacks)?
- Our database includes 296 publications tagged with this CPC code.
- Is patent activity under CPC H01M8/04649 growing?
- Publication counts under this code: 15 in 2024 vs 26 in 2025 (latest complete years).