Patents by Inventor Lars Winhammar

Lars Winhammar 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).

  • Device for reducing undesired energy consumption in a room provided with heating and/or air conditioning means
    Patent number: 4035796
    Abstract: Disclosed is a simple apparatus for turning off a heating or air conditioning unit when a door or window is opened. Switches activated by the opening of doors or windows control the operation of a heater or air conditioner through a relay system that doubles as a burglar alarm when an alarm circuit is activated.
    Type: Grant
    Filed: August 4, 1975
    Date of Patent: July 12, 1977
    Inventors: Sven Hedly, Lars Winhammar