Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 138,853 pages of information and 225,311 images on early companies, their products and the people who designed and built them.
of Carholme Road, Lincoln
Established by AEI as part of its Electronics Group
1966 Profits had improved and orders increased
1967 Became part of GEC-AEI (Electronics)
1968 Thyristors 
1980 Became part of the new Marconi Electronic Devices