December 1981

December 1981: 15 companies

December 1, 1981 2 companies

December 2, 1981 1 companies

December 3, 1981 1 companies

December 7, 1981 1 companies

December 8, 1981 2 companies

December 9, 1981 1 companies

December 10, 1981 1 companies

December 11, 1981 2 companies

December 23, 1981 2 companies

December 29, 1981 1 companies

December 30, 1981 1 companies