Patents by Inventor Mark C. Lengsfeld

Mark C. Lengsfeld 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).

  • Face shield
    Patent number: D929047
    Type: Grant
    Filed: May 7, 2020
    Date of Patent: August 24, 2021
    Inventors: Robin W. Deans, Mark C. Lengsfeld, Frederick Daryl Lane