Unique Instruments Corporation
No. 41, B. B. Ganguly Street, Near Central Metro Station
Kolkata- 700012, West Bengal (India)
System Service
No. 63/1, B. K. Moitra Road, Baranagar
Kolkata- 700036, West Bengal (India)
ACME Industries
No 20/1, Benaras Road, Salkia, Howrah, West Bengal.
Howrah- 711106, West Bengal (India)
Scientific Miscellany Co.
No. 11, Pasupati Bose Lane
Kolkata- 700003, West Bengal (India)
Eleco Instruments
No. 13/1, Kabi Nabin Sen Road
Kolkata- 700028, West Bengal (India)