Patents by Inventor Marvin L. Hollingsworth

Marvin L. Hollingsworth 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).

  • Liquid lamp
    Patent number: D325642
    Type: Grant
    Filed: April 20, 1990
    Date of Patent: April 21, 1992
    Assignee: Standex International Corporation
    Inventor: Marvin L. Hollingsworth