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William N. Keifer

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  • Sugar Grove, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Secondary seal for a sealing arrangement
    • Patent number 6,092,809
    • Issue date Jul 25, 2000
    • Caterpillar Inc.
    • William N. Keifer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...