A reagent to flocculate coal slurry water in coal washeries
GB279741A
An improved method of manufacturing faced concrete building blocks or slabs and the like
GB277192A
Improvements relating to the manufacture of faced or ornamental concrete and (or) cement building blocks, slabs, tiles and the like with return ends or faces
GB253330A
Improvements in the manufacture of faced or ornamental concrete and (or) cement building blocks, slabs, tiles and the like
US1505457A
Changeable illuminator
US1486406A
Yarn holder
US1401384A
Apparatus for use in making faced concrete building-blocks
GB144193A
Improvements in the manufacture of reinforced concrete or cement beams and the like
GB146773A
Improved building blocks or slabs made of concrete or cement
GB147983A
An improved method of and apparatus for use in making faced concrete building blocksor slabs and the like
