• Method of producing parts and molds using composite ceramic powders 

      Harris L. Marcus; Udaykumar Lakshminarayan (United States Patent and Trademark Office, 1992-09-15)
      A method and apparatus for selectively sintering a layer of powder to produce a part comprising a plurality of sintered layers. The apparatus includes a computer controlling a laser to direct the laser energy onto the ...
    • Method of producing parts by selective beam interaction of powder with gas phase reactant 

      Harris L. Marcus; David L. Bourell; Udaykumar Lakshminarayan (United States Patent and Trademark Office, 1993-01-26)
      A method and apparatus for selectively sintering a layer of powder to produce a part comprising a plurality of sintered layers. The apparatus includes a computer controlling a laser to direct the laser energy onto each ...