Patents by Inventor Rainar Wiebalck

Rainar Wiebalck 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).

  • Model aircraft with altitude change indicating means
    Patent number: 4238791
    Abstract: A model aircraft with wireless earth-to-craft control. A device is aboard to emit signals indicating altitude change and visible by the operator on earth, this device being triggered operatively by signals produced by an air-pressure transducer of small size and having low inertia of movable parts.
    Type: Grant
    Filed: September 26, 1978
    Date of Patent: December 9, 1980
    Inventor: Rainar Wiebalck