Robert L. Berthiaume

Person

  • Shrewsbury, MA, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Filter for plastic extruding machine

    • Patent number 4,021,346
    • Issue date May 3, 1977
    • Robert L. Berthiaume
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL