Complex sentence: Marvin was called the Edison of manufacturing for his innovations in the bakery business--by 1888 the largest in the United States--and the centerpiece to the organization of the National Biscuit Company (Nabisco).
Split into simpler sentences: Marvin was called the Edison of manufacturing for his innovations in the bakery business. By 1888 it was the largest in the US, and the centerpiece of the National Biscuit Company (Nabisco).