Patents by Inventor Frank M. Hubbard

Frank M. Hubbard 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).

  • Portable expandable lap desk
    Patent number: 5348263
    Abstract: This invention relates to a portable expandable desk comprising a first substantially rigid flat surface member; a second substantially rigid flat surface member; a means for hingedly attaching the first surface member to the second surface member so that the first and second surface members are capable of folding together; and a means for bracing the first surface member and the second surface member in an unfold position wherein the bracing means comprises a gripping means to prevent the bracing means from inadvertently disengaging from the first or second surface member.
    Type: Grant
    Filed: October 18, 1993
    Date of Patent: September 20, 1994
    Inventor: Frank M. Hubbard