Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,368 pages of information and 230,031 images on early companies, their products and the people who designed and built them.
Aviation Developments Ltd. of Welwyn Garden City, Hertfordshire.
1936 Became private company.
1937 Manufacturers of patented aircraft components. "Chobert" Automatic Rivetting process.
1939 See Aircraft Industry Suppliers
1961 Aircraft and general engineering, specialising in fastening devices. 500 employees.