Inventor
ARM WOLFGANG
DE6 patents
Patents
6 patentsUS5466091ANov 14, 1995
Surface drainage apparatus
AHLMANN ACO SEVERIN28 citations89
US5462382AOct 31, 1995
Surface drainage apparatus
AHLMANN ACO SEVERIN33 citations89
US5437516AAug 1, 1995
Surface drainage apparatus
AHLMANN ACO SEVERIN27 citations88
US5468096ANov 21, 1995
Means for securing a cover over a drainage channel
AHLMANN ACO SEVERIN13 citations69
US6793439B1Sep 21, 2004
Securing device for a drainage channel
AHLMANN ACO SEVERIN7 citations67
US5518336AMay 21, 1996
Drainage gutter and method of installing
AHLMANN ACO SEVERIN3 citations60