Patents by Inventor John Hugh Dennis

John Hugh Dennis 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).

  • Electrostatic aerosol filtering apparatus
    Patent number: 7235120
    Abstract: A battery (16) drives an electric motor (17) which in turn drives a fan (18). A circuit board (20) controls the operation of the motor and fan to maintain the flow rate. Air is drawn through an inlet (22) and out through a vent (24). Foam discs (32) and (34) may extract particles from the air and an electrostatic filter may attract aerosols in the air.
    Type: Grant
    Filed: April 22, 2002
    Date of Patent: June 26, 2007
    Assignee: University of Bradford
    Inventor: John Hugh Dennis
  • Electrostatic aerosol filtering apparatus
    Publication number: 20040216612
    Abstract: A battery (16) drives an electric motor (17) which in turn drives a fan (18). A circuit board (20) controls the operation of the motor and fan to maintain the flow rate. Air is drawn through an inlet (22) and out through a vent (24). Foam discs (32) and (34) may extract particles from the air and an electrostatic filter may attract aerosols in the air.
    Type: Application
    Filed: June 14, 2004
    Publication date: November 4, 2004
    Inventor: John Hugh Dennis