Patents Represented by Attorney Donald E. Porter

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  • Machine tool with hollow structural steel members
    Patent number: 4177550
    Abstract: The bed and upright of a machine tool are made of structural steel tubes which are welded together to form unitary structures. Each of the structural steel tubes is substantially rectangular in cross-sectional shape.
    Type: Grant
    Filed: February 1, 1978
    Date of Patent: December 11, 1979
    Assignee: Kearney & Trecker Corporation
    Inventors: Charles B. Sipek, Richard Johnstone, Russell B. Clegg