Patents by Inventor J. David Johnson

J. David 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).

  • Survey marker cap
    Patent number: D289859
    Type: Grant
    Filed: February 19, 1985
    Date of Patent: May 19, 1987
    Inventors: J. David Johnson, John D. Johnson