7 public-domain matches

Cipher And Telegraph Codes

Cover of Acme commodity and phrase code

Acme commodity and phrase code

Acme Code Company.

Cover of Atlas, The, Universal Travellers' And Tourists' Telegraphic Cipher Code

Atlas, The, Universal Travellers' And Tourists' Telegraphic Cipher Code

Thomas Walter Hartfield

Cover of Telegraph code, 1883

Telegraph code, 1883

Kean & Co. Preston

Telegraphic Code to Insure Privacy and Secrecy in the Transmission of Telegrams

Telegraphic Code to Insure Privacy and Secrecy in the Transmission of Telegrams

Frank Miller

How to Write Telegrams Properly

How to Write Telegrams Properly

Nelson E. Ross

Receiving Telegraph Instrument

Receiving Telegraph Instrument

Charles R. Underhill

Telegraph System. United States patent 1108529

Telegraph System. United States patent 1108529

Charles R. Underhill