Complex sentence: Formica was invented in 1912 by Daniel J. O'Conor and Herbert A. Faber, working at Westinghouse, which filed for a patent on it on 1 February 1913.
Split into simpler sentences: Formica was invented in 1912 by Daniel J. O'Conor and Herbert A. Faber, while working at Westinghouse. They filed for a patent on it on 1 February 1913.