Inventor
HELMES LUDGER
DE7 patents
Patents
7 patentsUS5867862AFeb 9, 1999
Vacuum cleaning appliance with telescopic handle
VORWERK CO INTERHOLDING31 citations91
US5766283AJun 16, 1998
Dust filter bag for a vacuum cleaner
VORWERK CO INTERHOLDING57 citations91
US5468271ANov 21, 1995
Dust filter bag for a vacuum cleaner
VORWERK CO INTERHOLDING25 citations89
US4532667AAug 6, 1985
Floor cleaning device having a replaceable brush assembly
VORWERK CO INTERHOLDING31 citations89
US4610340ASep 9, 1986
Overload safety on clutches
VORWERK CO INTERHOLDING26 citations85
US4458378AJul 10, 1984
Vacuum cleaner nozzle
VORWERK CO INTERHOLDING14 citations72
US4888850ADec 26, 1989
Vacuum cleaner nozzle arrangement
VORWERK CO INTERHOLDING11 citations71