Inventor

PORRILL JOHN

GB2 patents

Patents

2 patents

US7648080B2Jan 19, 2010

Rail fixing device

BUTZBACHER WEICHENBAU GMBH25 citations88

US8033480B2Oct 11, 2011

Arrangement for fastening railroad rails to a sleeper

BUTZBACHER WEICHENBAU GMBH4 citations58