SIGSALY (Japanese Wikipedia)

Analysis of information sources in references of the Wikipedia article "SIGSALY" in Japanese language version.

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google.com

  • Homer Dudley. Signal Transmission US Patent No.2151019, May 21, 1939. (Filed Oct. 30, 1935)
  • 具体的な回路は以下を参照、Ralph L. Miller. Telephone privacy system US Patent No.3976839, Jun 30, 1944. (Filed Aug 24, 1976)

handle.net

hdl.handle.net

jstor.org

nagoya-u.ac.jp

murase.m.is.nagoya-u.ac.jp

nsa.gov

ralph-miller.org

turing.org.uk