A description of the vibrator (Engl. pat. 1890. No.4390.) and directions for use

You can use this work for any purpose without restriction under copyright law.

Public Domain Mark (PDM) terms and conditions https://creativecommons.org/publicdomain/mark/1.0

A description of the vibrator (Engl. pat. 1890. No.4390.) and directions for use. Public Domain Mark