Werner Liebknecht worked at the Waffenamt, Group WA Prf 7 Section II in Wire Communication Techniques from January 1937 until April 1945 and he conducted engineering design on teletype encoding of the SZ40 and SZ42 for the Germany Army.
From January 1937 to 9 April 1945 Liebknecht worked at the Waffenamt, Group WA Pruf 7 Section II in Wire Communication Techniques. His work on speech encipherment involved working on technical questions of speech (Ciphony) and on Wireless telegraphy and on telegraphy in general, Liebknecht conducted engineering design on teletype encoding of the SZ40 and SZ42 for the Germany Army. 
