TREA

Frederick C. Hahn

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  • Aloha, OR, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of making tooth point
    • Patent number 5,188,680
    • Issue date Feb 23, 1993
    • ESCO Corporation
    • Frederick C. Hahn
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Excavating tooth point and method of replacement
    • Patent number 5,152,088
    • Issue date Oct 6, 1992
    • ESCO Corporation
    • Frederick C. Hahn
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Method of replacing a worn excavating tooth point
    • Patent number 5,074,062
    • Issue date Dec 24, 1991
    • ESCO Corporation
    • Frederick C. Hahn
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Excavating tooth having a lock including a basket spring
    • Patent number 4,727,663
    • Issue date Mar 1, 1988
    • ESCO Corporation
    • Frederick C. Hahn
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Excavating tooth point for use with basket spring retainer
    • Patent number 4,716,668
    • Issue date Jan 5, 1988
    • ESCO Corporation
    • Frederick C. Hahn
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Locking device for whisler type adapter
    • Patent number 4,663,867
    • Issue date May 12, 1987
    • ESCO Corporation
    • Frederick C. Hahn
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Flight for link chain conveyor
    • Patent number 4,585,117
    • Issue date Apr 29, 1986
    • ESCO Corporation
    • Frederick C. Hahn
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Excavating tooth system
    • Patent number 4,577,423
    • Issue date Mar 25, 1986
    • ESCO Corporation
    • Frederick C. Hahn
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Two piece cutting edge construction
    • Patent number 4,501,079
    • Issue date Feb 26, 1985
    • ESCO Corporation
    • Frederick C. Hahn
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Mounting for excavating implement and method
    • Patent number 4,470,210
    • Issue date Sep 11, 1984
    • ESCO Corporation
    • Frederick C. Hahn
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Excavating tooth
    • Patent number 4,428,131
    • Issue date Jan 31, 1984
    • ESCO Corporation
    • Frederick C. Hahn
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Excavating tooth
    • Patent number 4,335,532
    • Issue date Jun 22, 1982
    • ESCO Corporation
    • Frederick C. Hahn
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Locking device for excavating equipment
    • Patent number 4,267,653
    • Issue date May 19, 1981
    • ESCO Corporation
    • Frederick C. Hahn
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Releasable lock for excavating tooth
    • Patent number 4,061,432
    • Issue date Dec 6, 1977
    • ESCO Corporation
    • Frederick C. Hahn
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING