Inventor

KRACKHARDT ERNST-CHRISTOPH

DE3 patents

Patents

3 patents

US9476311B2Oct 25, 2016

Variable-pitch propeller or repeller

KRACKHARDT ERNST-CHRISTOPH5 citations61

US8821200B2Sep 2, 2014

Modular gondola drive for a floating device

KRACKHARDT ERNST-CHRISTOPH5 citations61

US8482164B2Jul 9, 2013

Buoyant harbor power supply

KRACKHARDT ERNST-CHRISTOPH1 citations42