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Patent drawing - GlagolinPatent - . Public domain  image

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Patent drawing - GlagolinPatent - . Public domain image

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Summary

схема из американского патента №1.893.167 Бориса Глаголина "Вращающаяся сценическая установка" (Rotating Stage Mounting — US Patent №1.863.167)

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Date

21/06/1932
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Source

USPTO
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public domain

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