4. Electricity: battery or capacitor charging or discharging
  5. Battery or cell charging
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Battery-powered electrical device with improved calculation of d

Electricity: battery or capacitor charging or discharging – Battery or cell charging – With peak detection of current or voltage
Patent

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Bicycle battery charger and speedometer circuit

Electricity: battery or capacitor charging or discharging – Battery or cell charging
Reissue Patent

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Buffer battery power supply system

Electricity: battery or capacitor charging or discharging – Battery or cell charging – Pulsed
Reexamination Certificate

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Buffer battery power supply system

Electricity: battery or capacitor charging or discharging – Battery or cell charging – Pulsed
Reexamination Certificate

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Buzzer driving device

Electricity: battery or capacitor charging or discharging – Battery or cell charging – Time control
Patent

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