Patents by Inventor David John Royle

David John Royle 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).

  • Smoke ventilation
    Patent number: 11167156
    Abstract: The invention provides door and window sensors, which can be incorporated into building pressurisation and depressurisation systems, for use in protecting a building's escape routes against smoke ingress during a fire.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: November 9, 2021
    Inventor: David John Royle
  • SMOKE VENTILATION
    Publication number: 20190314653
    Abstract: The invention provides door and window sensors, which can be incorporated into building pressurisation and depressurisation systems, for use in protecting a building's escape routes against smoke ingress during a fire.
    Type: Application
    Filed: April 23, 2019
    Publication date: October 17, 2019
    Inventor: David John Royle
  • Smoke ventilation
    Patent number: 10265552
    Abstract: The invention provides door and window sensors, which can be incorporated into building pressurization and depressurization systems, for use in protecting a building's escape routes against smoke ingress during a fire.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: April 23, 2019
    Inventors: David John Royle, Danish Ahmad
  • SMOKE VENTILATION
    Publication number: 20140248833
    Abstract: The invention provides door and window sensors, which can be incorporated into building pressurisation and depressurisation systems, for use in protecting a building's escape routes against smoke ingress during a fire.
    Type: Application
    Filed: June 28, 2012
    Publication date: September 4, 2014
    Inventors: David John Royle, Danish Ahmad