the subdivisions consisting of concentric perforated walls, or spiral-shaped walls

Patents Grantslast 30 patents

  • Information Patent Grant

    3833749

    • Patent number 3,833,749
    • Issue date Sep 3, 1974
    • A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
  • Information Patent Grant

    3469324

    • Patent number 3,469,324
    • Issue date Sep 30, 1969
    • B22 - CASTING POWDER METALLURGY
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    3137546

    • Patent number 3,137,546
    • Issue date Jun 16, 1964
    • F26 - DRYING
  • Information Patent Grant

    2878584

    • Patent number 2,878,584
    • Issue date Mar 24, 1959
    • F26 - DRYING
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    2850809

    • Patent number 2,850,809
    • Issue date Sep 9, 1958
    • A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
  • Information Patent Grant

    2838177

    • Patent number 2,838,177
    • Issue date Jun 10, 1958
    • F26 - DRYING
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    1996347

    • Patent number 1,996,347
    • Issue date Apr 2, 1935
    • F26 - DRYING
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    1623017

    • Patent number 1,623,017
    • Issue date Mar 29, 1927
    • F26 - DRYING