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Stephen J. Heller

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  • Shakopee, MN, US
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Patents Applicationslast 30 patents

  • Information Patent Application

    PORTABLE CEMENT MIXING APPARATUS
    • Publication number 20120230147
    • Publication date Sep 13, 2012
    • Stephen J. Heller
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Application

    PORTABLE CEMENT MIXING APPARATUS
    • Publication number 20090177313
    • Publication date Jul 9, 2009
    • Stephen J. Heller
    • B28 - WORKING CEMENT, CLAY, OR STONE