William R. Baker of Billerica, formerly of Charlestown, died Wednesday, March 25, 2009 at his home after a brief illness. He was the beloved husband of Marie (Reilly) Baker, with whom he celebrated 40 years of marriage on July 6, 2008. He was born in Fall River, August 30, 1947, the son of the late Earl and Mildred (Kinane) Baker. For the last three years he worked for the Concord Electric Supply Company in Woburn. Prior to that he was employed by Sweetheart Plastic in Wilmington as a maintenance mechanic for 13 years. An avid NASCAR fan, he also loved antique car shows. Besides his wife he is survived by his three daughters, Caryn Baker of Andover and Brenda Baker and Kelly Baker, both of Billerica, his two sisters, Carol D�Ambrosio of Melrose and Candice Macoul of Charlestown, and his brother, Robert Baker of Orange, MA. He also leaves his many nieces and nephews and his beloved pets, Brandy and Pebbles. He was also the brother of the late Barry Baker.