Complex sentence: CorningWare's oven-to-table service first featured the little blue "Cornflower" decoration, designed by Joseph Baum, an artist at the Charles Brunelle Advertising Agency in Hartford, Connecticut, which became the trademark of Corning consumer products for three decades.
Split into simpler sentences: CorningWare's oven-to-table service first featured the blue' Cornflower' pattern decoration, designed by Joseph Baum, an artist at the Charles Brunelle Advertising Agency in Hartford, Connecticut. It became the trademark of Corning consumer products for three decades.