1906 - formed the Telegraph Condenser Co to manufacture and market his inventions.

1910/11 - formed a new company, S. G. Brown Ltd, to manufacture telephone equipment.

1916 - served as a member of the Admiralty's inventions board during the First World War.

1916 - elected a fellow of the Royal Society.

1943 - retired and sold his interest in the Telegraph Condenser Co to a syndicate, and S. G. Brown Ltd to the Admiralty.