Patents by Inventor Herman R. C. Tromp

Herman R. C. Tromp 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).

  • Band pass filter
    Patent number: 4127833
    Abstract: Filter chain comprising at least two cascaded duals, each provided with two acoustically coupled resonators, only one of the two resonant frequencies of each of the duals falling within the filter pass band; the duals are convex at least on one side so as to render the acoustic coupling between the resonators so strong that the distance between the two resonant frequencies of the dual is as great as possible.
    Type: Grant
    Filed: January 31, 1977
    Date of Patent: November 28, 1978
    Assignee: De Staat der Nederlanden, te Dezen Vertegenwoordigd Door de Directeur-Generaal der Posterijen, Telegrafie en Telefonie
    Inventors: Jan A. Bezemer, Herman R. C. Tromp