1936 - Combined Optical Industries Limited is founded. Traded at 21 Denmark St., London (1936-?) & 200 Bath Rd., Slough, Berks. (1975-1990s), both England. 1999 - Company name changed to Combined Optical Instruments Limited. CTP Coils Limited was also formed from Coil USA (CTP Inc). 2004 - registered name changes to Carclo Technical Plastics (Slough) Limited.