Patents by Inventor Petrus Franciscus Stevens

Petrus Franciscus Stevens 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).

  • Keyboard
    Patent number: 4101883
    Abstract: A keyboard for a physiological measuring system, comprising a group of location indication buttons which are arranged on an image of, for example, the heart at locations which correspond to feasible measuring positions. Furthermore, there are preferably provided a number of selection buttons, each of which can have a location indication button associated therewith. This is made visible by means of signal lamps which are arranged adjacent each location indication button.
    Type: Grant
    Filed: April 20, 1977
    Date of Patent: July 18, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Klaas Hempenius, Jan Cornelis Van Mourik, Petrus Franciscus Stevens
  • Gamma camera in which only the three largest signals are used for position determination
    Patent number: 4074135
    Abstract: A gamma camera in which the signals of the three detectors supplying the comparatively largest signals are used for the position determination of scintillations. As a result, the detection device has a simpler construction, can operate faster and a substantial improvement is achieved in regard to the signal-to-noise ratio of the signals used.
    Type: Grant
    Filed: October 17, 1975
    Date of Patent: February 14, 1978
    Assignee: U.S. Philips Corporation
    Inventor: Petrus Franciscus Stevens