Inventor

HANSEN KARL R

US3 patents

Patents

3 patents

US5873138AFeb 23, 1999

Lost motion foot pedal linkage

TENNANT CO8 citations70

US7488391B2Feb 10, 2009

Rotating brush optimizing method

TENNANT CO2 citations55

US7082639B2Aug 1, 2006

Brush optimizer

TENNANT CO2 citations55