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BELOZUBOV EM, Patent No. 2026536
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BELOZUBOV EM, Patent No. 1834131
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BELOZUBOV EM, Patent No. 2024829
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BELOZUBOV EM, Patent No. 20141453
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BELOZUBOV EM, Patent No. 1615578
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BELOZUBOV EM, Patent No. 1760410