Patents by Inventor Marvin Hinckley Howell

Marvin Hinckley Howell 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).

  • In-ground spa installation
    Patent number: 8869469
    Abstract: A system for providing an in-ground installation of a portable spa using a Spa Vault assembly.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: October 28, 2014
    Assignee: Bullfrog International, L.C.
    Inventors: David J. Ludlow, Marvin Hinckley Howell
  • IN-GROUND SPA INSTALLATION
    Publication number: 20130152297
    Abstract: A system for providing an in-ground installation of a portable spa using a Spa Vault assembly.
    Type: Application
    Filed: August 23, 2012
    Publication date: June 20, 2013
    Inventors: David J. Ludlow, Marvin Hinckley Howell