Patents by Inventor Lawrence C Johnson

Lawrence C Johnson 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).

  • Step extender
    Patent number: D770642
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: November 1, 2016
    Inventor: Lawrence C Johnson