Ranked by oldest manufacturers: 1. Hexagon Manufacturing Intelligence | Year founded: 1833 2. Tiffany & Co. | Year founded: 1837 3. Bradford Soap Works Inc. | Year founded: 1876 The complete list is available for purchase online. For information about participating in PBN’s Top Lists, or to make additions or corrections, call (401) 680-4838 or write to
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Ranked by oldest manufacturers:
1.