1923 – The Electric Dog – Hugo Gernsback * (American)

(Source: Practical Electrics Sep. 1923 ed Hugo Gernsback)

This electric dog follows a magnetic walking cane in any direction like an obedient servant. Simply hold the cane in front of the dog's nose, whereupon the dog starts running and will follow the cane straight ahead or to the right or left as desired.

See pdf of full article here

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