Talk:Popular Science Monthly/Volume 89/July 1916/Look Out Perhaps the Man You're Talking to Wears a Detectaphone

FYI: the patent referred to in this article is U.S. Patent 1191182, "Dictograph Apparatus", patented July 18, 1916. - Klever (talk) 10:50, 4 April 2012 (UTC)
 * Hah, excellent find - thank you. StateOfAvon (talk) 22:46, 6 April 2012 (UTC)