Complex sentence: The company was founded in 1812 by Elisha Hunt, Joseph White and Daniel French, who also designed and built the engine and power train for both the "Despatch" and the "Enterprise".
Split into simpler sentences: The company was founded in 1812 by Elisha Hunt, Joseph White and Daniel French. Shourds Daniel French also designed and built the engine and power train for both the "Despatch" and the "Enterprise".