Patents by Inventor Dean J. Madsen

Dean J. Madsen 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).

  • Food carton opener
    Patent number: D245393
    Type: Grant
    Filed: November 12, 1975
    Date of Patent: August 16, 1977
    Inventors: Dean J. Madsen, Robert G. Madsen, Gordon W. Nichols
  • Food container opener
    Patent number: D254834
    Type: Grant
    Filed: June 20, 1977
    Date of Patent: April 29, 1980
    Inventors: Dean J. Madsen, Robert G. Madsen, Gordon W. Nichols
  • Container opener
    Patent number: D296411
    Type: Grant
    Filed: August 9, 1985
    Date of Patent: June 28, 1988
    Inventors: Dean J. Madsen, Robert G. Madsen, Gordon W. Nichols