Fuel cell system
US-2019393519-A1 · Dec 26, 2019 · US
Electric variables
Electric variables · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01M8/04537 |
| Official title | Electric variables |
| Display label | Electric variables |
| Total patents | 182 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 17 |
| 2016 | 6 |
| 2017 | 12 |
| 2018 | 16 |
| 2019 | 21 |
| 2020 | 14 |
| 2021 | 14 |
| 2022 | 22 |
| 2023 | 23 |
| 2024 | 13 |
| 2025 | 21 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods, devices and systems for providing power to a linear amplifier
US-2019348731-A1 · Nov 14, 2019 · US
Fuel cell system and control method for fuel cell system
US-10454121-B2 · Oct 22, 2019 · US
Apparatus and method for determining the condition of an electricity-producing cell
US-10403916-B2 · Sep 3, 2019 · US
Multimode charging device and method
US-10374436-B2 · Aug 6, 2019 · US
Method for determining critical operating states in a fuel cell stack
US-10345389-B2 · Jul 9, 2019 · US
Fuel cell system and secondary battery diagnosis method
US-10270112-B2 · Apr 23, 2019 · US
Method for determining critical operating states in a fuel cell stack
US-2019049521-A1 · Feb 14, 2019 · US
Electric-field enhanced performance in catalysis and solid-state devices involving gases
US-10197521-B2 · Feb 5, 2019 · US
Fuel cell system and control method for fuel cell system
US-2018358639-A1 · Dec 13, 2018 · US
Method for determining critical operating states in a fuel cell stack
US-10145900-B2 · Dec 4, 2018 · US
Motor vehicle with a fuel cell
US-2018301719-A1 · Oct 18, 2018 · US
Method for controlling startup of fuel cell vehicle
US-10090540-B2 · Oct 2, 2018 · US
Exhaust processing unit
US-2018277862-A1 · Sep 27, 2018 · US
Stack voltage control for recovery mode using boost converter
US-10069160-B2 · Sep 4, 2018 · US
Fuel cell vehicle and control method thereof
US-2018236894-A1 · Aug 23, 2018 · US
Apparatus and method for determining the condition of an electricity-producing cell
US-2018212262-A1 · Jul 26, 2018 · US
Method for monitoring the operating state of fuel cells
US-2018198140-A1 · Jul 12, 2018 · US
Fuel cell system and secondary battery diagnosis method
US-2018166720-A1 · Jun 14, 2018 · US
Power control apparatus, fuel cell system, and method of calculating amount of used fuel gas
US-2018159153-A1 · Jun 7, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01M8/04537?
- CPC H01M8/04537 is the Cooperative Patent Classification code for “Electric variables.”
- How many patents are filed under CPC H01M8/04537 (Electric variables)?
- Our database includes 182 publications tagged with this CPC code.
- Is patent activity under CPC H01M8/04537 growing?
- Publication counts under this code: 13 in 2024 vs 21 in 2025 (latest complete years).