Patents by Inventor Delbert Lee Hartman

Delbert Lee Hartman 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).

  • Self adjusting sail vertical shaft windmill
    Patent number: 7118341
    Abstract: A vertical shaft is provided and supported whereupon are mounted sails that can so self adjust as to interact with the wind in such a way as to power a windmill as well as relieve themselves from winds that are too severe while maintaining continuous operation.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: October 10, 2006
    Inventor: Delbert Lee Hartman