Methods and devices of 425nm wavelength reference construction based on fluorescence-induced effect
US-2026056053-A1 · Feb 26, 2026 · US
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by heterodyning or by beat-frequency comparison with the harmonic of an oscillator
by heterodyning or by beat-frequency comparison with the harmonic of an oscillator · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G01R23/145 |
| Official title | {by heterodyning or by beat-frequency comparison with the harmonic of an oscillator} |
| Display label | by heterodyning or by beat-frequency comparison with the harmonic of an oscillator |
| Total patents | 15 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 4 |
| 2021 | 4 |
| 2023 | 1 |
| 2024 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Anomaly detection apparatus, method and computer-readable medium
US-12044714-B2 · Jul 23, 2024 · US
Frequency detection circuit
US-11726118-B2 · Aug 15, 2023 · US
Frequency detection circuit
US-2021311098-A1 · Oct 7, 2021 · US
Anomaly detection apparatus, method and computer-readable medium
US-2021247427-A1 · Aug 12, 2021 · US
Apparatus and method for measuring frequency of signal
US-10931294-B2 · Feb 23, 2021 · US
Apparatus and method for measuring frequency of signal
US-2021013897-A1 · Jan 14, 2021 · US
Systems and methods for measuring the frequency of signals generated by high frequency medical devices
US-10338115-B2 · Jul 2, 2019 · US
Electrical measuring system and method for operating the system
US-10338116-B2 · Jul 2, 2019 · US
Method of testing semiconductor devices and system for testing semiconductor devices
US-10324128-B2 · Jun 18, 2019 · US
Systems and methods for measuring the frequency of signals generated by high frequency medical devices
US-2019004099-A1 · Jan 3, 2019 · US
Systems and methods for measuring the frequency of signals generated by high frequency medical devices
US-10073125-B2 · Sep 11, 2018 · US
Method of testing semiconductor devices and system for testing semiconductor devices
US-2018188311-A1 · Jul 5, 2018 · US
Systems and methods for measuring the frequency of signals generated by high frequency medical devices
US-2017089962-A1 · Mar 30, 2017 · US
Systems and methods for measuring the frequency of signals generated by high frequency medical devices
US-9529025-B2 · Dec 27, 2016 · US