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GB749520A
|
|
Improvements in or relating to machines for making pipes from concrete or the like
|
|
GB738872A
|
|
Improvements relating to the manufacture of pipes
|
|
GB556707A
|
|
Improvements in or relating to drainage and sewerage systems and pipes therefor
|
|
GB519829A
|
|
Improvements in or relating to machines for making pipes
|
|
GB419494A
|
|
Improvements in or relating to machines for making pipes
|
|
GB378558A
|
|
Improvements relating to methods of and apparatus for the production of concrete slabs or blocks, and to the product thereof
|
|
GB361545A
|
|
Improvements relating to joints or couplings for pipes or tubes
|
|
GB362602A
|
|
Improvements relating to drain pipes
|
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GB262519A
|
|
Improvements in or relating to mixing machines or appliances
|
|
GB262518A
|
|
Improvements in or relating to mixing machines or appliances
|
|
GB254457A
|
|
Improvements in or relating to tunnelling machines
|
|
GB254839A
|
|
Improvements in or relating to tunnelling machines
|
|
GB249288A
|
|
Improvements in or relating to endless-track vehicles
|
|
GB184906A
|
|
Improvements in or relating to power navvies and like excavating machines
|
|
US1403530A
|
|
Tunneling machine
|
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GB159342A
|
|
Improvements in or relating to tunnelling machines
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