Detection of earbud insertion in a case
US-12556013-B2 · Feb 17, 2026 · US
using DC
using DC · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G01V3/04 |
| Official title | using DC |
| Display label | using DC |
| Total patents | 38 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 2 |
| 2019 | 1 |
| 2020 | 5 |
| 2021 | 3 |
| 2022 | 6 |
| 2023 | 5 |
| 2024 | 6 |
| 2025 | 1 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Randomly distributed tensor resistivity measurement method and system
US-12529818-B2 · Jan 20, 2026 · US
Randomly Distributed Tensor Resistivity Measurement Method and System
US-2025370156-A1 · Dec 4, 2025 · US
Phase-synchronized buried object transmitter and locator methods and apparatus
US-12105244-B1 · Oct 1, 2024 · US
Resistivity imaging system with compensator for parasitic impedances between electrodes and their conductive substrates
US-12092600-B2 · Sep 17, 2024 · US
Obstacle detection systems and methods
US-12078771-B2 · Sep 3, 2024 · US
Subsea vehicle with flooded connector detection system
US-2024241282-A1 · Jul 18, 2024 · US
Device for evaluating characteristics of target ground containing metal component
US-11977199-B2 · May 7, 2024 · US
Detection of earbud insertion in a case
US-2024106250-A1 · Mar 28, 2024 · US
Water detecting device and method of water detection
US-11796503-B2 · Oct 24, 2023 · US
Method for determining a status of a track section of a railroad; associated apparatus and non-transitory computer readable medium
US-11702119-B2 · Jul 18, 2023 · US
Vector-resistivity-based real-time advanced detection method for water-bearing hazard body
US-2023184983-A1 · Jun 15, 2023 · US
Obstacle detection systems and methods
US-2023012212-A1 · Jan 12, 2023 · US
Resistivity Imaging System with Compensator for Parasitic Impedances between Electrodes and their Conductive Substrates
US-2023003677-A1 · Jan 5, 2023 · US
Method for determining a status of a track section of a railroad; associated apparatus and non-transitory computer readable medium
US-2022355841-A1 · Nov 10, 2022 · US
Earthquake prediction method and earthquake prediction system
US-11480697-B2 · Oct 25, 2022 · US
Pest detector
US-11477974-B2 · Oct 25, 2022 · US
Device for evaluating characteristics of target ground containing metal component
US-2022308255-A1 · Sep 29, 2022 · US
Obstacle detection systems and methods
US-11353618-B2 · Jun 7, 2022 · US
Devices and methods for measuring temperature, oxidation reduction potential, and water-level within a subsurface formation
US-11300705-B2 · Apr 12, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G01V3/04?
- CPC G01V3/04 is the Cooperative Patent Classification code for “using DC.”
- How many patents are filed under CPC G01V3/04 (using DC)?
- Our database includes 38 publications tagged with this CPC code.
- Is patent activity under CPC G01V3/04 growing?
- Publication counts under this code: 6 in 2024 vs 1 in 2025 (latest complete years).