Inventor:Ropkins; John W. T.
No. of patents:1
||Title Of Patent
||Forming a passageway through the ground
||July 14, 1992|
|A method of forming a passageway (P) through the ground by inserting into the ground a structure (1) comprising a superstructure (3) and a substructure (2). The superstructure (3) is inserted into position in the ground, and the substructure (2) is urged into the ground beneath the s|