In 1854, the U.S. Supreme Court considered Samuel Morse’s famous patent on the telegraph. Rather than limit his patent claims to the “specific machinery” of the device, Morse included a broad claim covering any device that used electricity to print out information.
As Morse declared, “the essence of my invention” is “the use of the motive power of the electric or galvanic current, which I call electro-magnetism, however developed, for making or printing intelligible characters, letters or signs, at any distances, being a new application of that power, of which I claim to be the first inventor or discoverer.”
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