MAKE A MEME View Large Image Patent 661,619 - Magnetic recorder.jpg Figure 1 of United States Patent 661 619 by Danish inventor Valdemar Poulsen - the first magnetic recorder United States Patent Office Issued November 13 1900 United States Patent Office Valdemar ...
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Keywords: US Patent 661,619 - Magnetic recorder.jpg Figure 1 of United States Patent 661 619 by Danish inventor Valdemar Poulsen - the first magnetic recorder United States Patent Office Issued November 13 1900 United States Patent Office Valdemar Poulsen inventor Public domain - original work of the US Federal Government All text and figures in US Patents are in the public domain PD-USGov Audio storage media Valdemar Poulsen Wire recorders Telegraphon
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