Giorgia Santo Stefano della Cerda, GB191410733A
Electric Light Switches Shining in the Dark.
Image credit: Santo Stefano della Cerda, G. (1914)
On March 4, 1915, Giorgia Santo Stefano della Cerda of Viareggio, Italy, was granted a patent for improvements to electric light switches. Her invention featured a ring placed on the switch cover that emitted a glow, helping users locate the switch in the dark.
Date of Application: 1 May 1914
Date of Issuance: 4 March 1915
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Francesca Chiaradia
PhD Student in Economics
My research interests include law and economics, economics of innovation, and information economics.