Closed loop control for fuel cell water management
US-2019393526-A1 · Dec 26, 2019 · US
Other electric variables, e.g. resistance or impedance
Other electric variables, e.g. resistance or impedance · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01M8/04634 |
| Official title | {Other electric variables, e.g. resistance or impedance} |
| Display label | Other electric variables, e.g. resistance or impedance |
| Total patents | 134 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 15 |
| 2017 | 14 |
| 2018 | 17 |
| 2019 | 18 |
| 2020 | 11 |
| 2021 | 19 |
| 2022 | 11 |
| 2023 | 6 |
| 2024 | 8 |
| 2025 | 8 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Anode bleed control in a fuel cell stack
US-2019237784-A1 · Aug 1, 2019 · US
Power conditioning system and control method therefor
US-10340539-B2 · Jul 2, 2019 · US
Redox flow battery, electrical quantity measurement system, and electrical quantity measurement method
US-2019165384-A1 · May 30, 2019 · US
Direct Isopropanol Fuel Cell
US-2019148755-A1 · May 16, 2019 · US
Direct isopropanol fuel cell
US-10230120-B2 · Mar 12, 2019 · US
Fuel cell system and performance improvement method of fuel cell system
US-10199668-B2 · Feb 5, 2019 · US
Fuel cell internal state detection system and state detection method
US-10193174-B2 · Jan 29, 2019 · US
Power conditioning system and control method therefor
US-10193167-B2 · Jan 29, 2019 · US
Method of controlling operation of fuel cell
US-2018351185-A1 · Dec 6, 2018 · US
Fuel cell system and method of controlling operation of fuel cell
US-10122030-B2 · Nov 6, 2018 · US
State detection device and method for fuel cell
US-10115987-B2 · Oct 30, 2018 · US
Fuel cell system
US-2018294494-A1 · Oct 11, 2018 · US
Fuel cell system
US-10069159-B2 · Sep 4, 2018 · US
Fuel cell system
US-2018219239-A1 · Aug 2, 2018 · US
Fuel cell system
US-10038207-B2 · Jul 31, 2018 · US
Electrochemical battery and method of operating the same
US-10008753-B2 · Jun 26, 2018 · US
Safety system of fuel cell vehicle and control method for the same
US-10000139-B2 · Jun 19, 2018 · US
Power conditioning system and control method therefor
US-2018145350-A1 · May 24, 2018 · US
Power conditioning system and control method therefor
US-2018123152-A1 · May 3, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01M8/04634?
- CPC H01M8/04634 is the Cooperative Patent Classification code for “Other electric variables, e.g. resistance or impedance.”
- How many patents are filed under CPC H01M8/04634 (Other electric variables, e.g. resistance or impedance)?
- Our database includes 134 publications tagged with this CPC code.
- Is patent activity under CPC H01M8/04634 growing?
- Publication counts under this code: 8 in 2024 vs 8 in 2025 (latest complete years).