active 1897-1968, laboratory apparatus and instrument maker, London, England Baird and Tatlock (London) Limited 1897 - 2012
active 1944-1954, laboratory apparatus & instrument maker, London, England W and J George and Becker Limited 1910 - 1954
active 1928-1954, laboratory apparatus; laboratory instrument maker, London, England Griffin and Tatlock Limited 1889 - 1999
active 1887-1979, laboratory apparatus & instrument maker, Glasgow, Scotland Baird and Tatlock Limited 1887 - 1979
active 1894-1928, laboratory apparatus & instrument maker, London, England J J Griffin and Sons Limited
active 1860s-1894, laboratory apparatus & instrument maker, London, England, British J. J. Griffin & Sons