Density-based coffee roast level characterization and/or dynamic coffee grinder control
US-12569085-B2 · Mar 10, 2026 · US
of fluids
of fluids · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G01N9/04 |
| Official title | of fluids |
| Display label | of fluids |
| Total patents | 32 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 5 |
| 2019 | 5 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 3 |
| 2023 | 2 |
| 2024 | 6 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Enhanced vehicle fuel quantity indication system
US-12459662-B2 · Nov 4, 2025 · US
Molten-state suspended ellipsoidal droplet image processing algorithm based on dual-camera vision
US-12320823-B2 · Jun 3, 2025 · US
Gas densimeter
US-12247994-B2 · Mar 11, 2025 · US
Apparatus and method for measuring settling of weighting materials in drilling and completion fluids
US-12174169-B2 · Dec 24, 2024 · US
Enhanced vehicle fuel quantity indication system
US-2024359807-A1 · Oct 31, 2024 · US
Densimeter
US-12066452-B2 · Aug 20, 2024 · US
Density-based coffee roast level characterization and/or dynamic coffee grinder control
US-2024188750-A1 · Jun 13, 2024 · US
Gas densimeter
US-2024094105-A1 · Mar 21, 2024 · US
Gas densimeter
US-11867712-B2 · Jan 9, 2024 · US
Apparatus and method for measuring settling of weighting materials in drilling and completion fluids
US-2023228729-A1 · Jul 20, 2023 · US
Molten-state suspended ellipsoidal droplet image processing algorithm based on dual-camera vision
US-2023160799-A1 · May 25, 2023 · US
Densimeter
US-2022397504-A1 · Dec 15, 2022 · US
Hot melt adhesive foam dispensing system
US-2022105481-A1 · Apr 7, 2022 · US
Systems and methods for automatically evaluating slurry properties
US-11215544-B2 · Jan 4, 2022 · US
Analytical liquid monitoring device
US-11054354-B2 · Jul 6, 2021 · US
Gas densimeter
US-2020191691-A1 · Jun 18, 2020 · US
Analytical liquid monitoring device
US-2019257731-A1 · Aug 22, 2019 · US
Systems And Methods For Automatically Evaluating Slurry Properties
US-2019212239-A1 · Jul 11, 2019 · US
Liquid parameter detecting method and system
US-10307537-B2 · Jun 4, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G01N9/04?
- CPC G01N9/04 is the Cooperative Patent Classification code for “of fluids.”
- How many patents are filed under CPC G01N9/04 (of fluids)?
- Our database includes 32 publications tagged with this CPC code.
- Is patent activity under CPC G01N9/04 growing?
- Publication counts under this code: 6 in 2024 vs 3 in 2025 (latest complete years).