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Резюме

1521020 patent of 1923

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Тэги

патенты патентные чертежи патентное бюро США патенты из США изобретения
date_range

Дата

30/12/1924
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Источник

USPTO
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Ссылка

http://uspto.gov/
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Информация о правах

public domain

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Темы

патенты патентные чертежи патентное бюро США патенты из США изобретения