Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,470 pages of information and 233,895 images on early companies, their products and the people who designed and built them.
of Carholme Road, Lincoln
1966 Profits had improved and orders increased
1967 Became part of GEC-AEI (Electronics)
1968 Thyristors 
1969 Part of GEC Semiconductors
1980 Became part of the new Marconi Electronic Devices