Patents by Inventor Wouter Wies VAN DER Schaar

Wouter Wies VAN DER Schaar 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).

  • Apparatus for regulating the breathing pattern
    Patent number: 4064869
    Abstract: A portable apparatus for regulating the breathing pattern of a patient intended to be used as a remedy against the hyperventilation syndrome. A sensor attached to the body of the patient responds to movements of the chest. The output signals of the sensor are converted into control impulses having a repetition frequency equal to the breathing frequency and providing a criterion for the regulation. The regulation is performed with the aid of a tone generator alternately producing two audible tones having a different character. This tone generator is only in operation if the breathing frequency of the patient is below a prescribed limit frequency.
    Type: Grant
    Filed: October 16, 1975
    Date of Patent: December 27, 1977
    Inventors: Peter Bernard Defares, Wouter Wies VAN DER Schaar, Eduard Theodorus Verveen