TREA

David R. Campbell

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  • Salt Lake City, UT, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Device and method for torque assist of drag arm
    • Patent number 5,449,263
    • Issue date Sep 12, 1995
    • Cambelt International Corporation
    • David R. Campbell
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Device and method for outloading bulk materials
    • Patent number 5,180,272
    • Issue date Jan 19, 1993
    • Cambelt International Corporation
    • David R. Campbell
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Device and method for outloading bulk materials
    • Patent number 5,098,247
    • Issue date Mar 24, 1992
    • Cambelt International Corporation
    • David R. Campbell
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Apparatus for supporting and enclosing conveyor systems
    • Patent number 4,714,151
    • Issue date Dec 22, 1987
    • Cambelt International Corporation
    • Colin D. Campbell
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Enclosed conveyor
    • Patent number 4,170,293
    • Issue date Oct 9, 1979
    • Cambelt International Corporation
    • David R. Campbell
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Cable conveyor
    • Patent number 3,993,184
    • Issue date Nov 23, 1976
    • Cambelt International Corporation
    • David R. Campbell
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL