Patents Assigned to Substratum S.A.
  • Plate for grating and grating resulting therefrom
    Patent number: 4169339
    Abstract: A grating plate includes a succession of opposed symmetrical pyramids having arms connected at their tops with wax-drop shaped reinforcing elements. Fixing means are provided on the sides for connecting a plurality of grating plates together.
    Type: Grant
    Filed: January 31, 1978
    Date of Patent: October 2, 1979
    Assignee: Substratum S.A.
    Inventor: Jacques L. A. See