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Sonicon Rocket, electromechanical sound control toy.


robothut

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Patent for Helmholtz resonator switch in the Alphadrome patent section.

1955 and 1961 patents for Sonicon toy control. - ROBOT PATENTS - Alphadrome

I am not able to past a active link for the alphadrome page, so look it up if interested.

PatentHelm.jpg

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