Patents Assigned to Jochen Plenk KG
  • Ski with non-symmetrical running surface
    Patent number: 4262925
    Abstract: A ski, particularly a cross-country ski having improved sliding and adhering properties, which comprises a running surface subdivided into at least two zones, which can include an obtuse angle between them, and/or wedge-shaped parts on its top surface.
    Type: Grant
    Filed: December 1, 1978
    Date of Patent: April 21, 1981
    Assignee: Jochen Plenk KG
    Inventor: Hans-Joachim Plenk