Roger N. Pearson

Person

  • Elk River, MN, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Hydraulically controlled water spool valve

    • Patent number 5,513,671
    • Issue date May 7, 1996
    • Schwing America, Inc.
    • Ronald J. Cortopassi
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...