Donald E. Drumm

Person

  • Billerica, MA, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Autoilluminating lamp system

    • Patent number RE41628
    • Issue date Sep 7, 2010
    • Helen of Troy Limited
    • Stefane E. Barbeau
    • 320 - Electricity: battery or capacitor charging or discharging