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Frederick C. Hallberg

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  • Wheaton, MD, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Workpiece positioning vise
    • Patent number 4,448,406
    • Issue date May 15, 1984
    • The United States of America as represented by the administrator of the Natio...
    • Frederick C. Hallberg
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Crystal cleaving machine
    • Patent number 4,343,287
    • Issue date Aug 10, 1982
    • The United States of America as represented by the administrator of the Natio...
    • Frederick C. Hallberg
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Method and apparatus for slicing crystals
    • Patent number 4,184,472
    • Issue date Jan 22, 1980
    • The United States of America as represented by the administrator of the Natio...
    • John S. J. Benedicto
    • B28 - WORKING CEMENT, CLAY, OR STONE