Marten Bondestam 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).
Abstract: A rotor including soft rotor structures fixed to the rotor shaft, which rotor structures are of a soft material such as canvas or the like. The rotor structure is a loop arranged to form an asymmetrical cone when an air or water current flows through the loop.
Abstract: A rotor including soft rotor structures fixed to the rotor shaft, which rotor structures are of a soft material such as canvas or the like. The rotor structure is a loop arranged to form an asymmetrical cone when an air or water current flows through the loop.
Abstract: A kite comprising at least two bags into which the wind is blowing through air openings in the front end of the bags, and which are joined to each other by a horizontal seam. The shroud line is attached directly to the seam or to a keel which is attached to said longitudinal seam in the middle of the kite. The air openings are diminished by pleats or the like along the edges of the openings. The openings can be closed after the filling with air or gas in which case the kite is flying like a balloon.
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