Patents by Inventor Helmut Prager

Helmut Prager 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).

  • Circuit board/envelope compound structure
    Publication number: 20070012481
    Abstract: A printed circuit board/sheathing bond structure with a sheathing enclosing a printed circuit board (11) includes two plastic-half-shells (12, 13) whose edges are closely bonded to each other in order to hermetically seal the printed circuit board (11).
    Type: Application
    Filed: July 18, 2005
    Publication date: January 18, 2007
    Inventor: Helmut Prager
  • Device for detecting, monitoring and controlling the operating status of an electric iron
    Patent number: 6720537
    Abstract: Device for detecting, monitoring and controlling the operating status of an electric iron which is provided with at least one electric heating circuit having a heating element and a first power switch of the iron connected in series to the heating element. The device includes a control unit being provided as an integrated circuit, a second power switch which is controlled by the control unit depending on the operating status of the electric iron and which is connected in series with the electric heating circuit. An indicator unit having at least one indicator element indicates the heating status of the electric iron. A low voltage power supply for energizing at least one of the control unit, indicating unit, and second power switch. A low-impedance measuring resistance is connected in series with the second power switch, and provides an indirect detection means of the switching status of both power switches.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: April 13, 2004
    Inventor: Helmut Prager
  • Device for detecting, monitoring and controlling the operating status of an electric iron
    Publication number: 20020130123
    Abstract: Device for detecting, monitoring and controlling the operating status of an electric iron which is provided with at least one electric heating circuit having a heating element and a first power switch of the iron connected in series to the heating element. The device includes a control unit being provided as an integrated circuit, a second power switch which is controlled by the control unit depending on the operating status of the electric iron and which is connected in series with the electric heating circuit. An indicator unit having at least one indicator element indicates the heating status of the electric iron. A low voltage power supply for energizing at least one of the control unit, indicating unit, and second power switch. A low-impedance measuring resistance is connected in series with the second power switch, and provides an indirect detection means of the switching status of both power switches.
    Type: Application
    Filed: March 6, 2002
    Publication date: September 19, 2002
    Inventor: Helmut Prager