Series wound direct-current motor driving device and equipment
US-11387717-B2 · Jul 12, 2022 · US
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having series connection of excitation windings
having series connection of excitation windings · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02K23/08 |
| Official title | having series connection of excitation windings |
| Display label | having series connection of excitation windings |
| Total patents | 15 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 2 |
| 2021 | 4 |
| 2022 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Direct current motor
US-11355973-B2 · Jun 7, 2022 · US
Series Wound Direct-current Motor Driving Device and Equipment
US-2022021281-A1 · Jan 20, 2022 · US
Direct current motor
US-11211855-B2 · Dec 28, 2021 · US
Direct current motor
US-2021242762-A1 · Aug 5, 2021 · US
Direct current motor
US-2021210997-A1 · Jul 8, 2021 · US
Power tool
US-11027405-B2 · Jun 8, 2021 · US
Power tool
US-10868462-B2 · Dec 15, 2020 · US
Electric drive apparatus, chopper, DC motor, and electric device
US-10622876-B2 · Apr 14, 2020 · US
Electric drive apparatus, chopper, dc motor, and electric device
US-2019319523-A1 · Oct 17, 2019 · US
Power Tool
US-2019099873-A1 · Apr 4, 2019 · US
Power tool
US-2018241291-A1 · Aug 23, 2018 · US
Direct current motor
US-9985401-B2 · May 29, 2018 · US
Rotor windings for DC motor
US-9627934-B2 · Apr 18, 2017 · US
Direct current motor
US-2016268751-A1 · Sep 15, 2016 · US