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  • CPC
  • E21C25/28
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Patents Grantslast 30 patents

  • Information Patent Grant

    System and method for monitoring fault conditions in a pan line of...

    • Patent number 11,085,798
    • Issue date Aug 10, 2021
    • Caterpillar Global Mining Europe GmbH
    • Euan Russell Kirkhope
    • G02 - OPTICS
  • Information Patent Grant

    Chain saw

    • Patent number 4,981,129
    • Issue date Jan 1, 1991
    • Bror E. Osterman
    • B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
  • Information Patent Grant

    Cutter chains having picks and to picks therefor

    • Patent number 4,089,561
    • Issue date May 16, 1978
    • Gimda, Inc.
    • John Carden
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3778112

    • Patent number 3,778,112
    • Issue date Dec 11, 1973
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    3604755

    • Patent number 3,604,755
    • Issue date Sep 14, 1971
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3580639

    • Patent number 3,580,639
    • Issue date May 25, 1971
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3550962

    • Patent number 3,550,962
    • Issue date Dec 29, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3463026

    • Patent number 3,463,026
    • Issue date Aug 26, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3436122

    • Patent number 3,436,122
    • Issue date Apr 1, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3384417

    • Patent number 3,384,417
    • Issue date May 21, 1968
    • B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
  • Information Patent Grant

    3378308

    • Patent number 3,378,308
    • Issue date Apr 16, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2956442

    • Patent number 2,956,442
    • Issue date Oct 18, 1960
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2877006

    • Patent number 2,877,006
    • Issue date Mar 10, 1959
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2851261

    • Patent number 2,851,261
    • Issue date Sep 9, 1958
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2822699

    • Patent number 2,822,699
    • Issue date Feb 11, 1958
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2810568

    • Patent number 2,810,568
    • Issue date Oct 22, 1957
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2766979

    • Patent number 2,766,979
    • Issue date Oct 16, 1956
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2661940

    • Patent number 2,661,940
    • Issue date Dec 8, 1953
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2653808

    • Patent number 2,653,808
    • Issue date Sep 29, 1953
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2601978

    • Patent number 2,601,978
    • Issue date Jul 1, 1952
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2487232

    • Patent number 2,487,232
    • Issue date Nov 8, 1949
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2400230

    • Patent number 2,400,230
    • Issue date May 14, 1946
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2398107

    • Patent number 2,398,107
    • Issue date Apr 9, 1946
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2344750

    • Patent number 2,344,750
    • Issue date Mar 21, 1944
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2325792

    • Patent number 2,325,792
    • Issue date Aug 3, 1943
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    2324033

    • Patent number 2,324,033
    • Issue date Jul 13, 1943
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2251406

    • Patent number 2,251,406
    • Issue date Aug 5, 1941
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2246225

    • Patent number 2,246,225
    • Issue date Jun 17, 1941
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2189669

    • Patent number 2,189,669
    • Issue date Feb 6, 1940
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2139410

    • Patent number 2,139,410
    • Issue date Dec 6, 1938
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents