TREA

Machines for making slits approximately perpendicular to the seams either level with, or above or below the level of, the machine

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Industry

  • CPC
  • E21C25/62
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21CMINING OR QUARRYING E21C25/00Cutting machines

Current Industry

E21C25/62Machines for making slits approximately perpendicular to the seams either level with, or above or below the level of, the machine
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    2710180
    • Patent number 2,710,180
    • Issue date Jun 7, 1955
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2336487
    • Patent number 2,336,487
    • Issue date Dec 14, 1943
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2065809
    • Patent number 2,065,809
    • Issue date Dec 29, 1936
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1980135
    • Patent number 1,980,135
    • Issue date Nov 6, 1934
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1890187
    • Patent number 1,890,187
    • Issue date Dec 6, 1932
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1679130
    • Patent number 1,679,130
    • Issue date Jul 31, 1928
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1679136
    • Patent number 1,679,136
    • Issue date Jul 31, 1928
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1679127
    • Patent number 1,679,127
    • Issue date Jul 31, 1928
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1661630
    • Patent number 1,661,630
    • Issue date Mar 6, 1928
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1654218
    • Patent number 1,654,218
    • Issue date Dec 27, 1927
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1647885
    • Patent number 1,647,885
    • Issue date Nov 1, 1927
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1643665
    • Patent number 1,643,665
    • Issue date Sep 27, 1927
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1635623
    • Patent number 1,635,623
    • Issue date Jul 12, 1927
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1614035
    • Patent number 1,614,035
    • Issue date Jan 11, 1927
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1614034
    • Patent number 1,614,034
    • Issue date Jan 11, 1927
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1554606
    • Patent number 1,554,606
    • Issue date Sep 22, 1925
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1537084
    • Patent number 1,537,084
    • Issue date May 12, 1925
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1520995
    • Patent number 1,520,995
    • Issue date Dec 30, 1924
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1521036
    • Patent number 1,521,036
    • Issue date Dec 30, 1924
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1519740
    • Patent number 1,519,740
    • Issue date Dec 16, 1924
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1518125
    • Patent number 1,518,125
    • Issue date Dec 2, 1924
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1509080
    • Patent number 1,509,080
    • Issue date Sep 16, 1924
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1422386
    • Patent number 1,422,386
    • Issue date Jul 11, 1922
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1332689
    • Patent number 1,332,689
    • Issue date Mar 2, 1920
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1310248
    • Patent number 1,310,248
    • Issue date Jul 15, 1919
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1304524
    • Patent number 1,304,524
    • Issue date May 20, 1919
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1275156
    • Patent number 1,275,156
    • Issue date Aug 6, 1918
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1269296
    • Patent number 1,269,296
    • Issue date Jun 11, 1918
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1269298
    • Patent number 1,269,298
    • Issue date Jun 11, 1918
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1269295
    • Patent number 1,269,295
    • Issue date Jun 11, 1918
    • E21 - EARTH DRILLING MINING