Patents Assigned to Norddeutsche Schleifmittel-Indutrie Christiansen & Co.
  • Hollow body grinding materials
    Patent number: RE29808
    Abstract: A grinding material comprising a multiplicity of hollow bodies whose walls are formed of abrasive grains and a bonding means and are arranged to be stable in resistance to grinding forces.
    Type: Grant
    Filed: September 12, 1977
    Date of Patent: October 24, 1978
    Assignee: Norddeutsche Schleifmittel-Indutrie Christiansen & Co.
    Inventor: Eckhard Wagner