April 1955

April 1955: 50 companies

1 April 1955 31 companies

4 April 1955 1 companies

6 April 1955 1 companies

8 April 1955 3 companies

10 April 1955 1 companies

11 April 1955 1 companies

15 April 1955 4 companies

20 April 1955 4 companies

22 April 1955 1 companies

28 April 1955 1 companies

30 April 1955 2 companies