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A poster with a reproduction of a patent depicting a wind turbine, more specifically, an invention related to balancing, at operating speeds, rotational masses that rotate at very low revolutions per minute. In particular, it concerns the in situ balancing of wind turbine rotor assemblies. The patent is from Orl W. Larsen.
Patent application No. US5140856A was published in 1992 by the United States Patent and Trademark Office. Wind turbine - poster
Size:8 x 12 inch