Patents by Inventor Lizabeth W. Dretzka

Lizabeth W. Dretzka 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).

  • Broom
    Patent number: D674197
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: January 15, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Adel M. Kassem Llano, Giuseppe De Bellis, Martin E. Broen, Lizabeth W. Dretzka, Valentina Tronconi
  • Dustpan
    Patent number: D684331
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: June 11, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Lloyd S. Vasilakes, Qian Zheng Zhou, Giuseppe De Bellis, Lizabeth W. Dretzka, Valentina Tronconi, Monica Jerez, Adel M. Kassem Llano
  • Dustpan
    Patent number: D687204
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: July 30, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Lloyd S. Vasilakes, Qian Zheng Zhou, Giuseppe De Bellis, Lizabeth W. Dretzka, Valentina Tronconi, Monica Jerez, Adel M. Kassem Llano
  • Handle for a cleaning tool
    Patent number: D698112
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: January 21, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Michael C. Molinet, Michael J. Kubes, Lizabeth W. Dretzka, Philip E. Hague, Yael Karni