Patents by Inventor Ralph E. Duszynski

Ralph E. Duszynski has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Air freshener housing
    Patent number: D321932
    Type: Grant
    Filed: April 19, 1990
    Date of Patent: November 26, 1991
    Inventor: Ralph E. Duszynski