Self-calibrating fire sensing device
US-12347294-B2 · Jul 1, 2025 · US
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by changing the gain of an amplifier
by changing the gain of an amplifier · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G08B29/28 |
| Official title | by changing the gain of an amplifier |
| Display label | by changing the gain of an amplifier |
| Total patents | 16 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 2 |
| 2017 | 1 |
| 2020 | 1 |
| 2021 | 3 |
| 2022 | 4 |
| 2023 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Self-calibrating fire sensing device
US-2023326315-A1 · Oct 12, 2023 · US
Self-calibrating fire sensing device
US-11688276-B2 · Jun 27, 2023 · US
Self-calibrating fire sensing device
US-11676466-B2 · Jun 13, 2023 · US
Portable smoke detector and method for identifying smoke generation position
US-11393312-B2 · Jul 19, 2022 · US
Power control circuit
US-11393325-B2 · Jul 19, 2022 · US
Self-calibrating fire sensing device
US-2022058929-A1 · Feb 24, 2022 · US
Self-calibrating fire sensing device
US-2022005344-A1 · Jan 6, 2022 · US
Self-calibrating fire sensing device
US-11127284-B1 · Sep 21, 2021 · US
Power Control Circuit
US-2021048836-A1 · Feb 18, 2021 · US
Portable smoke detector and method for identifying smoke generation position
US-2021043055-A1 · Feb 11, 2021 · US
Automatic adjustments of audio alert characteristics of an alert device using ambient noise levels
US-10879863-B2 · Dec 29, 2020 · US
Apparatus and method for improving the audibility of specific sounds to a user
US-9799210-B2 · Oct 24, 2017 · US
Systems and methods of detecting failure of an opening sensor
US-2016187368-A1 · Jun 30, 2016 · US
Automatic adjustments of audio alert characteristics of an alert device using ambient noise levels
US-2016105155-A1 · Apr 14, 2016 · US
Automatic adjustments of audio alert characteristics of an alert device using ambient noise levels
US-9167105-B2 · Oct 20, 2015 · US