Optical whispering gallery mode barcodes for high-precision and wide-range measurements
US-12546660-B2 · Feb 10, 2026 · US
using change of resonant frequency, e.g. of piezoelectric crystals
using change of resonant frequency, e.g. of piezoelectric crystals · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G01J5/44 |
| Official title | using change of resonant frequency, e.g. of piezoelectric crystals |
| Display label | using change of resonant frequency, e.g. of piezoelectric crystals |
| Total patents | 48 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 8 |
| 2017 | 8 |
| 2018 | 6 |
| 2019 | 6 |
| 2020 | 4 |
| 2021 | 2 |
| 2022 | 1 |
| 2023 | 4 |
| 2024 | 1 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Light sensor, light detection device, and terahertz/infrared fourier spectroscope
US-2025369803-A1 · Dec 4, 2025 · US
Systems and Methods for Integrated Cavity Optomechanical Thermal Imaging Transducer
US-2025369804-A1 · Dec 4, 2025 · US
Thermal sensor, thermal sensor array, electronic apparatus including the thermal sensor, and operating method of the thermal sensor
US-12389089-B2 · Aug 12, 2025 · US
Thermal sensor, thermal sensor array, electronic apparatus including the thermal sensor, and operating method of the thermal sensor
US-2024089568-A1 · Mar 14, 2024 · US
Temperature Measurement Device
US-2023280214-A1 · Sep 7, 2023 · US
Acoustic wave device
US-2023275554-A1 · Aug 31, 2023 · US
Microcavity-enhanced optical bolometer
US-11635330-B2 · Apr 25, 2023 · US
Optical whispering gallery mode barcodes for high-precision and wide-range measurements
US-2023010794-A1 · Jan 12, 2023 · US
Microcavity-Enhanced Optical Bolometer
US-2022236113-A1 · Jul 28, 2022 · US
Tunable resonant circuit comprising a RF resonator geometry disposed on an active material layer such that resonance changes when photon energy is applied
US-11114738-B2 · Sep 7, 2021 · US
Graphene nanomechanical radiation detector
US-11099076-B2 · Aug 24, 2021 · US
Visible light absorption element, and temperature visualization device and infrared ray visualization device equipped with same
US-10775243-B2 · Sep 15, 2020 · US
Proximity sensor having substrate including light sensing area and temperature sensing area
US-10749066-B2 · Aug 18, 2020 · US
Multispectral optical sensor and method of manufacturing the same
US-10697828-B2 · Jun 30, 2020 · US
Proximity sensor
US-2020028021-A1 · Jan 23, 2020 · US
Graphene nanomechanical radiation detector
US-2019277702-A1 · Sep 12, 2019 · US
Apparatus and method for MEMS resonant sensor arrays
US-10288487-B2 · May 14, 2019 · US
Optical microresonator device with thermal isolation
US-10247676-B1 · Apr 2, 2019 · US
Apparatus and method for mems resonant sensor arrays
US-2019049309-A1 · Feb 14, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G01J5/44?
- CPC G01J5/44 is the Cooperative Patent Classification code for “using change of resonant frequency, e.g. of piezoelectric crystals.”
- How many patents are filed under CPC G01J5/44 (using change of resonant frequency, e.g. of piezoelectric crystals)?
- Our database includes 48 publications tagged with this CPC code.
- Is patent activity under CPC G01J5/44 growing?
- Publication counts under this code: 1 in 2024 vs 3 in 2025 (latest complete years).