Emergency lighting devices with LED strings
US-9871404-B2 · Jan 16, 2018 · US
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Circuits providing for substitution in case of failure of the lamp
Circuits providing for substitution in case of failure of the lamp · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H05B41/46 |
| Official title | Circuits providing for substitution in case of failure of the lamp |
| Display label | Circuits providing for substitution in case of failure of the lamp |
| Total patents | 4 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity appears to be declining based on the most recent years.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2018 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.