Dobson Hardwick
1969 William Park and Co (Forgemaster) was merged with Dobson Hardwick, both of whom were substantial makers of roof props for underground mines. Formation of a new company Dobson Park Industries which would be owned 50:50 by the 2 constituent companies[1]
By 1970 included W. E. and F. Dobson, Trent Concrete, Kango Electric Hammers, Byron Jardine, Richard Simon and Sons[2]