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https://drivepatents.com/patents/1094060 · 13 Aug 2003
The invention relates to a trailer coupling for coupling to a towing ball (6), comprising a coupling housing (1), first and second coupling members (3,7) which are arranged in the housing and which comprise hollow friction-coupling surfaces directed toward...
https://drivepatents.com/patents/1109601 · 4 Oct 2001
The invention relates to a trailer coupling for coupling to a towing ball (3), comprising a coupling housing (2), first (5) and second (6) coupling members which are arranged in the housing and comprise hollow friction-coupling surfaces directed toward eac...