W. Crockatt and Sons
of 62 and 64 Darnley Street, Glasgow, Scotland. Telephone: Glasgow Telegraphic Address: "Crockatt, Glasgow"
1928 Patent - Improvements in and relating to means for indicating the presence of saline, alkaline, acid or other impurities in water and other fluids.
1937 Listed Exhibitor - British Industries Fair. The most economical and soundest Machines for expeditiously polishing terrazzo floors and polishing stone work of all descriptions. Wood Floor Sanding Machines likewise. (Stand No. B.902)
1954 Patent - Improvements in or relating to electricity measuring instruments.