High-Voltage System and Failure Diagnosis Method for High-Voltage System
US-2020300926-A1 · Sep 24, 2020 · US
characterised by magnetoviscosity, e.g. magnetorheological, magnetothixotropic, magnetodilatant liquids (electrorheological fluids C10M171/001)
characterised by magnetoviscosity, e.g. magnetorheological, magnetothixotropic, magnetodilatant liquids (electrorheological fluids C10M171/001) · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01F1/447 |
| Official title | {characterised by magnetoviscosity, e.g. magnetorheological, magnetothixotropic, magnetodilatant liquids (electrorheological fluids C10M171/001)} |
| Display label | characterised by magnetoviscosity, e.g. magnetorheological, magnetothixotropic, magnetodilatant liquids (electrorheological fluids C10M171/001) |
| Total patents | 155 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 10 |
| 2017 | 15 |
| 2018 | 9 |
| 2019 | 7 |
| 2020 | 18 |
| 2021 | 19 |
| 2022 | 21 |
| 2023 | 18 |
| 2024 | 16 |
| 2025 | 10 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Active electro-mechanical materials for protecting portable electronic devices
US-10779421-B1 · Sep 15, 2020 · US
Magnetically actuated tunable soft electronics
US-2020286657-A1 · Sep 10, 2020 · US
Magnetorheological fluid composition and vibration damping device using same
US-10706999-B2 · Jul 7, 2020 · US
Magnetic field alignment of emulsions to produce porous articles
US-10675819-B2 · Jun 9, 2020 · US
Haptic operating device and method
US-2020174512-A1 · Jun 4, 2020 · US
Stage device and processing apparatus
US-2020135434-A1 · Apr 30, 2020 · US
Mount bush
US-2020109762-A1 · Apr 9, 2020 · US
Mount bush
US-2020109761-A1 · Apr 9, 2020 · US
Reflector for vehicle lamps
US-2020088377-A1 · Mar 19, 2020 · US
Pore orientation using magnetic fields
US-10569480-B2 · Feb 25, 2020 · US
Magnetic field patterning of nickel nanofibers using precursor ink
US-2019322111-A1 · Oct 24, 2019 · US
Mechanical downhole pressure maintenance system
US-10435968-B2 · Oct 8, 2019 · US
Magneto rheological fluid composition for use in vehicle mount applications
US-10403422-B2 · Sep 3, 2019 · US
Haptic information provision device
US-2019241199-A1 · Aug 8, 2019 · US
Magnetorheological fluid composition and vibration damping device using same
US-2019051437-A1 · Feb 14, 2019 · US
Haptic information provision device
US-10204494-B2 · Feb 12, 2019 · US
Robot hand apparatus, robot hand system, and holding method
US-2019030729-A1 · Jan 31, 2019 · US
Rapid preconcentration of viable bacteria using magnetic ionic liquid for pcr amplification and culture-based diagnostics
US-2018298417-A1 · Oct 18, 2018 · US
Reversible adhesive compositions and related methods
US-10099458-B2 · Oct 16, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01F1/447?
- CPC H01F1/447 is the Cooperative Patent Classification code for “characterised by magnetoviscosity, e.g. magnetorheological, magnetothixotropic, magnetodilatant liquids (electrorheological fluids C10M171/001).”
- How many patents are filed under CPC H01F1/447 (characterised by magnetoviscosity, e.g. magnetorheological, magnetothixotropic, magnetodilatant liquids (electrorheological fluids C10M171/001))?
- Our database includes 155 publications tagged with this CPC code.
- Is patent activity under CPC H01F1/447 growing?
- Publication counts under this code: 16 in 2024 vs 10 in 2025 (latest complete years).