Direct current power supply exciter management
US-2021249940-A1 · Aug 12, 2021 · US
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using discharge tubes or semiconductor devices (H02P9/34 takes precedence)
using discharge tubes or semiconductor devices (H02P9/34 takes precedence) · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02P9/26 |
| Official title | using discharge tubes or semiconductor devices (H02P9/34 takes precedence) |
| Display label | using discharge tubes or semiconductor devices (H02P9/34 takes precedence) |
| Total patents | 8 |
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 | 1 |
| 2016 | 3 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Over-voltage protection device of generator and method for enhancing over-voltage protection function
US-10742020-B2 · Aug 11, 2020 · US
Over-voltage protection device of generator and method for enhancing over-voltage protection function
US-2019115747-A1 · Apr 18, 2019 · US
System for compensating rotor vibrations
US-10020764-B2 · Jul 10, 2018 · US
Field control device, method of field control, and synchronous rotating machine
US-9450522-B2 · Sep 20, 2016 · US
System for compensating rotor vibrations
US-2016094172-A1 · Mar 31, 2016 · US
Generator with power output during engine idle
US-2016072420-A1 · Mar 10, 2016 · US
Field control device, method of field control, and synchronous rotating machine
US-2015381082-A1 · Dec 31, 2015 · US