Patents by Inventor David Leroy HATFIELD

David Leroy HATFIELD 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).

  • ELECTRIC MOTOR ASSEMBLY
    Publication number: 20240140208
    Abstract: A propulsion apparatus for an electric vehicle including both a drive motor and a generator configured to recover energy from the vehicle drivetrain. The invention also relates to an energy supply and storage system suitable for use with a propulsion apparatus having a drive motor and generator, and to an electric vehicle having a powertrain including such a propulsion apparatus.
    Type: Application
    Filed: March 11, 2022
    Publication date: May 2, 2024
    Inventor: David Leroy HATFIELD