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Electronic Musical Resources: Patents : Individuals

Valdemar Poulsen

Three patents for the Telegraphone, the first magnetic recording system. He held over 80 patents.

  1. "Telegrafon", Valdemar Poulsen, Danish Patent DK2653, 1899
  2. "Telegrafon", Valdemar Poulsen, Danish Patent DK3629, 1900
  3. "Telegrafon", Valdemar Poulsen, Danish Patent DK43244, 1930




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