Patents by Inventor Jan Rietema

Jan Rietema 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).

  • Radiotherapeutic apparatus
    Patent number: 9669238
    Abstract: We provide a radiotherapeutic apparatus comprising a patient support, magnetic coils disposed around the patient support for creating a magnetic field therewithin, a radiation source producing a beam of radiation directed toward the patient support and mounted on a rotatable support thereby to rotate the radiation source around the patient support, a slip ring for conveying electrical power to the radiation source and located around the patient support, including at least one electrical interruption therein. This creates a slip ring in which there is no continuous circumferential path, and one in which the current is therefore forced to take a route via one side or the other.
    Type: Grant
    Filed: October 9, 2012
    Date of Patent: June 6, 2017
    Assignees: Elekta AB (publ), Koninklijke Philips Electronics N.V.
    Inventors: Christopher Knox, Duncan Bourne, Johan Overweg, Jan Rietema