Inventor

BACKS ULRICH

DE2 patents

Patents

2 patents

US7278845B2Oct 9, 2007

Concrete-block-making machine

HESS MASCHFAB GMBH & CO9 citations64

US7309933B2Dec 18, 2007

Vibrator for acting on an object in a predetermined direction and apparatus for producing concrete blocks

HESS MASCHFAB GMBH & CO0 citations40