Dobson Hardwick
Maker of mining, quarrying and hydraulic equipment, of Nottingham
1961 W. E. and F. Dobson was registered as a private company which allowed its parent, Dobson Hardwick, to be registered as a quoted public company[1]
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[2]
By 1970 included W. E. and F. Dobson, Trent Concrete, Kango Electric Hammers, Byron Jardine, Richard Simon and Sons[3]