US580035A Thaddeus Cahill, Telharmonium patent p.04
Forfatter/Opretter:
Kredit:
US patent application 580035, Thaddeus Cahill, "Art of and Apparatus for Generating and Distributing Music Electrically", published 1897-04-06
Shortlink:
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2256 x 3315 Pixel (1517305 Bytes)
beskrivelse:
Extrait du brevet 58035 du telharmonium de 1897, illustrant le principe de la roue phonique - source http://www.uspto.gov/patft/index.html -
Licens:
Public domain
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