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Patent us20040143917
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Sonicare toothbrush teardown: microcontroller, H bridge, and inductive

Sonicare toothbrush teardown: microcontroller, H bridge, and inductive

How do electric toothbrushes work? - Explain that Stuff

Patent US20040143917 - Electric toothbrush - Google Patents

The Electric vs. Manual Toothbrush Debate
toothbrush circuit - CircuitLab

How do electric toothbrushes work? - Explain that Stuff

555 electronic health care toothbrush circuit - Signal_Processing

Patent US8272091 - Electric toothbrush and method for controlling