Early Patents
- Thomas Edison US patent 131,334, "Coiled resistance wire rheostat", issued 1872-9-17
- Mary Hallock-Greenewalt invented a type of nonlinear rheostat for use in her visual-music instrument, the Sarabet (US patent 1,357,773 ) /dead link - need update/
Read more about this topic: Potentiometer
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“When first we faced, and touching showed
How well we knew the early moves ...”
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