Beautifully engraved certificate from the Indiana Bell Telephone Company, Inc. issued in 1970-1975. This historic document was printed by the Federated Banknote Company and has an ornate border around it with a vignette of a man and a woman standing outside of the Indiana Bell Building. This item has the printed signatures of the company's president and treasurer and is over 25 years old. The 22 Bell Operating Companies as owned by AT&T before divestiture on Jan 1, 1984. 1. Bell Telephone Company of Nevada known as Nevada Bell. managed by the RBOC Pacific Telesis, which has now merged with SBC Communications. 2. Illinois Bell Telephone Company. managed by the RBOC Ameritech 3. Indiana Bell Telephone Company managed by the RBOC Ameritech 4.Michigan Bell Telephone Company managed by the RBOC Ameritech 5.New England Telephone & Telegraph Company Formerly managed by the RBOC NYNEX. Due to a merger, it is now managed by the RBOC Bell Atlantic. 6. New Jersey Bell Telephone Company known as Bell Atlantic-New Jersey managed by the RBOC Bell Atlantic 7.Northwestern Bell Telephone Company managed by the RBOC US West. 8.Pacific Northwest Bell Telephone Company managed by US West. 9.Pacific Telephone & Telegraph Company known as Pacific Bell managed by the RBOC Pacific Telesis, which has now merged with SBC Communications. 10.South Central Bell Telephone Company 11. Southern Bell Telephone and Telegraph Company 12.Southwestern Bell Telephone Company. managed by the RBOC Southwestern Bell 13.The Bell Telephone Company of Pennslyvania. known as Bell Atlantic-Pennsylvania managed by the RBOC Bell Atlantic 14.The Chesapeake & Potomac Telephone Company. 15.The Chesapeake & Potomac Telephone Company of Maryland. known as Bell Atlantic-Maryland managed by the RBOC Bell Atlantic 16.The Chesapeake & Potomac Telephone Company of Virginia. 17.The Chesapeake & Potomac Telephone Company of West Virginia managed by the RBOC Bell Atlantic Changed its name to Bell Atlantic-West Virginia 18.The Diamond State Telephone Company 19.The Mountain States Telephone & Telegraph Company managed by the RBOC US West. 20.The New York Telephone Company Formerly managed by the RBOC NYNEX. Due to a merger, it is now managed by the RBOC Bell Atlantic. 21.The Ohio Bell Telephone Company managed by the RBOC Ameritech 22.Wisconsin Telephone Company managed by the RBOC Ameritech 23.Southern New England Bell Telephone Company 24.Cincinnati Bell Telephone Company