Patents by Inventor Johannes Carolus Adrianus Boeren

Johannes Carolus Adrianus Boeren 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).

  • Variable capacitor
    Patent number: 3950679
    Abstract: A variable capacitor comprising a rotatable drum, which serves as an electrode, and a belt, which is circumferentially guided about the drum and an auxiliary drum, for supporting the counter-electrode layer. This layer is separated from the rotatable drum by a vapor-deposited dielectric layer.
    Type: Grant
    Filed: November 20, 1974
    Date of Patent: April 13, 1976
    Assignee: U.S. Philips Corporation
    Inventor: Johannes Carolus Adrianus Boeren