Patents Assigned to Pristine Products
  • Process for applying identification to objects made of porous material
    Patent number: 4954192
    Abstract: A process for applying a permanent filled engraved identification to the surface of an object such as a paving brick which is made of porous material.
    Type: Grant
    Filed: August 30, 1989
    Date of Patent: September 4, 1990
    Assignee: Pristine Products
    Inventor: John T. Dziekan