Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 132,217 pages of information and 209,721 images on early companies, their products and the people who designed and built them.
of 6 Laurence Pountney Hill, London EC.
Ironworks at Tipton, porcelain works at Milton and Hanley, Staffs.
1840 A brother of Redvers Buller founded a pottery in Bovey Tracey
1843 Company established.
1865 The pottery was moved from Bovey Tracey to Hanley, Staffs
1868 Began to make telegraph insulators and went onto specialise in metal components for insulators, including power lines.
1890 The company was incorporated at Bullers Ltd
1899 The company was registered as a public company on 10 May, to take over the business of telegraphic engineers, ironfounders etc of a private company of the same name. 
1911 Electrical Exhibition. Insulators and lattice steel work masts. 
1914 Telegraph engineers, manufacturers of insulators, telegraph fittings, china door furniture, mortars, pestles etc., ironfoundry, metalwork, pottery. 
1931 Outline history of the business in 
1937 Electro-technical potters and general engineers. 
1938-68 Lock furniture manufacturers.
1960s Products included enamelled cast iron door knobs and insulator sheds for electrical power lines.
NB - this seems to be relevant but not quite sure how it fits in:
Charles Herbert Thompson was trained as a chemist and had many commercial interests in England and France. He formed the Crystaline Company as well as operating the firms of Bullers in Tipton and Thompson L'Hospied and Co near Stourbridge. He also owned an art pottery near to that of Clement Massier at Golfe Juan in the South of France. .
A correspondent writes - 'Arthur Tuffley attended Waldron Road School in London up until 1909 and migrated to Australia in 1912. Before leaving England, Arthur worked at Buller & Co Ltd as a goldsmith, manufacturing pearls and precious stone into fine jewellery.'