11 Oldest US Companies Still in Business

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  1. D. Landreth Seed Company
  2. In 1784, brothers David and Cuthbert Landreth established a seed producing company in Philadelphia. Now part of American Meadows, a private wildflower seed company, D. Landreth Seed Company has been recognized as the company that brought plants such as tomatoes, white potatoes, and zinnias to the US.

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