Patents Assigned to Alliance Enamelsteel Corporation S.A.
  • Blackboard rubber made of, or including, metal
    Patent number: 4697301
    Abstract: Blackboard rubber made of metal or having a metal base made up of two parts enclosed one within the other, the first part being in the form of a rectangular box and the second part being flat and forming a lid to the first part; the said second part comprises a centered metal plate and a magnet and is covered with a detachable rubbing sheet of soft material.
    Type: Grant
    Filed: December 27, 1985
    Date of Patent: October 6, 1987
    Assignee: Alliance Enamelsteel Corporation S.A.
    Inventor: Jos Palmans