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