Patents by Inventor Ernst Bernhard Hallqvist

Ernst Bernhard Hallqvist 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).

  • Pressure propellant generating system
    Patent number: 3973392
    Abstract: A pressure propellant generating system for a power plant in a submarine vehicle, said propellant including a sea water component, the pressure of which can be regulated so as to vary the output of the power plant in a controlled manner.
    Type: Grant
    Filed: October 9, 1974
    Date of Patent: August 10, 1976
    Assignee: Forenade Fabriksverken
    Inventor: Ernst Bernhard Hallqvist