Ergon Corporation
309, Al-Akbari Mansion, 27 Weston Street
Kolkata- 700012, West Bengal (India)
J. Umashankar & Company Private Limited
67a, Netaji Subhas Road,
Kolkata- 700001, West Bengal (India)
Amrit Enterprise
26/1/1, A Strand Road, 3rd Floor
Kolkata- 700001, West Bengal (India)