TREA

with slitting and breaking-down members situated in parallel on an intermediary level

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Industry

  • CPC
  • E21C27/126
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21CMINING OR QUARRYING E21C27/00Machines which completely free the mineral from the seam

Current Industry

E21C27/126with slitting and breaking-down members situated in parallel on an intermediary level
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    3206252
    • Patent number 3,206,252
    • Issue date Sep 14, 1965
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3061290
    • Patent number 3,061,290
    • Issue date Oct 30, 1962
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2932496
    • Patent number 2,932,496
    • Issue date Apr 12, 1960
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2768820
    • Patent number 2,768,820
    • Issue date Oct 30, 1956
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2751206
    • Patent number 2,751,206
    • Issue date Jun 19, 1956
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2750177
    • Patent number 2,750,177
    • Issue date Jun 12, 1956
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2730344
    • Patent number 2,730,344
    • Issue date Jan 10, 1956
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2699327
    • Patent number 2,699,327
    • Issue date Jan 11, 1955
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2695700
    • Patent number 2,695,700
    • Issue date Nov 30, 1954
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2677536
    • Patent number 2,677,536
    • Issue date May 4, 1954
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2676005
    • Patent number 2,676,005
    • Issue date Apr 20, 1954
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2668039
    • Patent number 2,668,039
    • Issue date Feb 2, 1954
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2642981
    • Patent number 2,642,981
    • Issue date Jun 23, 1953
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2643106
    • Patent number 2,643,106
    • Issue date Jun 23, 1953
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2612361
    • Patent number 2,612,361
    • Issue date Sep 30, 1952
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2415217
    • Patent number 2,415,217
    • Issue date Feb 4, 1947
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2287230
    • Patent number 2,287,230
    • Issue date Jun 23, 1942
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1762154
    • Patent number 1,762,154
    • Issue date Jun 10, 1930
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1674969
    • Patent number 1,674,969
    • Issue date Jun 26, 1928
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents