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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Ropkins; John W. T.
Address:
Orpington, GB2
No. of patents:
1
Patents:












Patent Number Title Of Patent Date Issued
5129760 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










 
 
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