Image two in Calahan's US patent 76157 for a "Telegraphic Indicator."
Image Source: patents.google.com
Image two in Calahan's US patent 76157 for a "Telegraphic Indicator."
Detail map of Manhattan, New York, New York, United States Overview map of Manhattan, New York, New York, United States

A: Manhattan, New York, New York, United States

Edward A. Calahan Invents the Stock Ticker

1867
Image one in Calahan's US patent 76157 for a "Telegraphic Indicator"
Image Source: patents.google.com
Image one in Calahan's US patent 76157 for a "Telegraphic Indicator"

In 1867 Edward A. Calahan of the American Telegraph Company invented the first stock price telegraph printing instrument, and ticker tape. The distinct sound of this telegraph printing instrument eventually earned it the name of “stock ticker.”

Calahan received U.S. patent 76157 for the stock ticker on March 31, 1868.

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Telecommunications
Technology / Engineering