Patents by Inventor Sarel Johannes Marais

Sarel Johannes Marais has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Plough share with reinforcement plate covering tongue holes therein
    Patent number: 4036307
    Abstract: A plough share made of metal having at least two spaced tongues pressed out of the metal and projecting rearwardly at an angle, the two tongues being adapted to engage in complementary holes formed in the frog of a plough. The plough share also has holes therein, these being formed by the tongues being pressed outwardly therefrom. These holes are covered by a reinforcement plate, which is attached to the side of the plough share opposite to the side to which the frog is to be attached.
    Type: Grant
    Filed: April 14, 1976
    Date of Patent: July 19, 1977
    Inventor: Sarel Johannes Marais