| http://www.w3.org/ns/prov#value | - A reflection of the intense competition between Bell, Thomas Edison and Emile Berliner for patents following the invention of the phonograph by Edison in 1877, these recordings, along with supporting documents, were offered to the Smithsonian by each inventor in his lifetime.???These recordings were made using a variety of methods and materials such as rubber, beeswax, glass, tin foil and brass, a
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