Ronald L. Sitzema Jr.

Person

  • Ellsworth, MI, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Vacuum cleaner headlight

    • Patent number 5,207,498
    • Issue date May 4, 1993
    • Electrolux Corporation
    • Randall K. Lawrence
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Dental impression tray

    • Patent number 4,867,682
    • Issue date Sep 19, 1989
    • Dentsply Research & Development Corp.
    • Paul D. Hammesfahr
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE