Patents by Inventor Matthias Helfert

Matthias Helfert 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).

  • Mounting device for a window cleaning appliance
    Patent number: D729474
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: May 12, 2015
    Assignee: Alfred Kaercher GmbH & Co. KG
    Inventors: Matthias Helfert, Michael Meyer
  • Window cleaning appliance
    Patent number: D769560
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: October 18, 2016
    Assignee: Alfred Kaercher GmbH & Co. KG
    Inventors: Matthias Helfert, Michael Meyer
  • Vacuum cleaner
    Patent number: D789627
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: June 13, 2017
    Assignee: Alfred Kaercher GmbH & Co. KG
    Inventors: Matthias Helfert, Michael Meyer
  • Electric vacuum cleaner
    Patent number: D789633
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: June 13, 2017
    Assignee: Alfred Kaercher GmbH & Co. KG
    Inventors: Michael Meyer, Matthias Helfert
  • Electric vacuum cleaner
    Patent number: D791420
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: July 4, 2017
    Assignee: Alfred Kaercher GmbH & Co. KG
    Inventors: Michael Meyer, Matthias Helfert
  • Electric vacuum cleaner
    Patent number: D792040
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: July 11, 2017
    Assignee: Alfred Kaercher GmbH & Co. KG
    Inventors: Michael Meyer, Matthias Helfert
  • Window cleaning appliance
    Patent number: D818231
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: May 15, 2018
    Assignee: Alfred Kaercher GmbH & Co. KG
    Inventors: Matthias Helfert, Michael Meyer
  • Window cleaning appliance
    Patent number: D828665
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: September 11, 2018
    Assignee: Alfred Kaercher GmbH & Co. KG
    Inventors: Matthias Helfert, Michael Meyer
  • Window cleaning appliance
    Patent number: D830026
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: October 2, 2018
    Assignee: Alfred Kaercher GmbH & Co. KG
    Inventors: Matthias Helfert, Michael Meyer
  • Window cleaning appliance
    Patent number: D874771
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: February 4, 2020
    Assignee: Alfred Kaercher SE & Co. KG
    Inventors: Michael Meyer, Matthias Helfert