William C. Hoffman

Person

  • Wilmington, DE, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Liquid extraction apparatus

    • Patent number 5,517,867
    • Issue date May 21, 1996
    • E. I. Du Pont de Nemours and Company
    • Keith A. Ely
    • G01 - MEASURING TESTING