Patent granted to the Sonophone Company of Canada Limited on September 21, 1916.
The following pictures are of a Son-o-phone machine for sale in Barrie in December, 2009 (photos by KW):
It was using a Victor Exhibition soundbox.
KW visited the Uxbridge Historical Centre in October, 2013 and was given permission to take and post the following pictures of their Son-o-phone:
A Sonophone for sale on Facebook Marketplace in 2023.