April 1955

April 1955: 50 companies

1 April 1955 3 companies

4 April 1955 4 companies

5 April 1955 3 companies

6 April 1955 1 companies

7 April 1955 3 companies

12 April 1955 2 companies

13 April 1955 4 companies

14 April 1955 1 companies

15 April 1955 1 companies

19 April 1955 4 companies

20 April 1955 1 companies

21 April 1955 2 companies

26 April 1955 3 companies

27 April 1955 9 companies

28 April 1955 7 companies

29 April 1955 2 companies