Method And System For Synchronizing Audio Transmission In A Single Frequency Network
US-2025167906-A1 · May 22, 2025 · US
FM digital or hybrid
FM digital or hybrid · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04H2201/183 |
| Official title | FM digital or hybrid |
| Display label | FM digital or hybrid |
| Total patents | 33 |
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 | 4 |
| 2017 | 2 |
| 2018 | 4 |
| 2019 | 7 |
| 2020 | 8 |
| 2021 | 3 |
| 2022 | 1 |
| 2023 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Power down workload estimation
US-11853558-B2 · Dec 26, 2023 · US
Method for estimating a signal-to-noise ratio
US-11757480-B2 · Sep 12, 2023 · US
Power down workload estimation
US-2023214126-A1 · Jul 6, 2023 · US
Method for estimating a signal-to-noise ratio
US-2022149875-A1 · May 12, 2022 · US
Time-alignment measurement for hybrid HD radio™ technology
US-11190334-B2 · Nov 30, 2021 · US
FM system modes for HD radio
US-11038622-B2 · Jun 15, 2021 · US
Advertising measurement and conversion measurement for radio systems
US-10924197-B2 · Feb 16, 2021 · US
Time-alignment measurment for hybrid hd tm radio technology
US-2020287703-A1 · Sep 10, 2020 · US
System and method for transmitting digital multimedia data with analog broadcast data
US-10735178-B2 · Aug 4, 2020 · US
Lumb service modes for FM HD radio broadcasts
US-10727980-B2 · Jul 28, 2020 · US
Advertising measurement and conversion measurement for radio systems
US-2020177296-A1 · Jun 4, 2020 · US
Advertising measurement and conversion measurement for radio systems
US-2020177295-A1 · Jun 4, 2020 · US
Advertising measurement and conversion measurement for radio systems
US-10673549-B1 · Jun 2, 2020 · US
Time-alignment measurement for hybrid HD radio technology
US-10666416-B2 · May 26, 2020 · US
Beam forming for first adjacent cancellation
US-10581476-B2 · Mar 3, 2020 · US
Beam forming for first adjacent cancellation
US-2019356347-A1 · Nov 21, 2019 · US
Analog and digital audio alignment in the HD radio exciter engine (exgine)
US-10484115-B2 · Nov 19, 2019 · US
Lumb service modes for fm hd radio broadcasts
US-2019349132-A1 · Nov 14, 2019 · US
Fm system modes for hd radio
US-2019260505-A1 · Aug 22, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04H2201/183?
- CPC H04H2201/183 is the Cooperative Patent Classification code for “FM digital or hybrid.”
- How many patents are filed under CPC H04H2201/183 (FM digital or hybrid)?
- Our database includes 33 publications tagged with this CPC code.
- Is patent activity under CPC H04H2201/183 growing?
- Publication counts under this code: 3 in 2023 vs 1 in 2025 (latest complete years).