Complex sentence: The brand was until February 1st 2013 a subsidiary of French company Bic, on February 1st 2013 The formerly French owned American based pen brand The Sheaffer Pen Company was bought by the American company Newell Rubbermaid.
Split into simpler sentences: The brand was until February 1st, 2013, a subsidiary of French company Bic. On February 1st, 2013, the formerly French-owned, American-based pen brand, the Sheaffer Pen Company, was bought by the American company Newell Rubbermaid.