Patents by Inventor Per E. C. Udden

Per E. C. Udden 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 to protect against flow of current
    Patent number: 4175255
    Abstract: A protective device to interrupt the flow of current at a work place when current of a magnitude to endanger life flows through the body of a person whereby at least two electrodes with skin contact are applied on a person which electrodes are connected to a voltage sensor which determines the voltage difference between the electrodes when current flows through the body and is designed to release a signal to a circuit breaking device which interrupts the flow of current when the current passing through the body exceeds the admissible value.
    Type: Grant
    Filed: September 6, 1977
    Date of Patent: November 20, 1979
    Inventors: Sven N. J. Linnman, Peter Isoz, Nils P. Branderud, Per E. C. Udden