Patents by Inventor Per Danfors

Per Danfors 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).

  • Protective device for capacitor bank
    Patent number: 4219856
    Abstract: A protective device for a capacitor bank is coupled to a cross-connection between equipotential points in two sub-banks forming the bank. Current or voltage surges, indicative of a capacitor failure are counted and when a threshold level is exceeded, an alarm may be energized.
    Type: Grant
    Filed: March 2, 1978
    Date of Patent: August 26, 1980
    Assignee: ASEA Aktiebolag
    Inventors: Per Danfors, Nils Fahlen, Owe Nerf