TREA

Hu D. DeVall

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  • Morgantown, WV, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Apparatus for repairing chains
    • Patent number 4,506,501
    • Issue date Mar 26, 1985
    • Donald L. DeVall
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Rotary valve
    • Patent number 4,478,248
    • Issue date Oct 23, 1984
    • Donald L. DeVall
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Pinion carrier
    • Patent number 4,458,548
    • Issue date Jul 10, 1984
    • Donald L. De Vall
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Drill head assembly
    • Patent number 4,416,337
    • Issue date Nov 22, 1983
    • Albert Phillips
    • E21 - EARTH DRILLING MINING