Category:Patent certificates from Russia
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This category has the following 4 subcategories, out of 4 total.
Media in category "Patent certificates from Russia"
The following 6 files are in this category, out of 6 total.
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Doc00395820151116120411 001.jpg 1,653 × 2,338; 279 KB
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Patenturkunde Karl Spitzenberg Russland 1906 Cropped.jpg 2,156 × 3,286; 5.63 MB
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Обратный клапан для бурильных труб.jpg 1,932 × 1,368; 704 KB
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Патент 2.jpg 960 × 1,280; 202 KB
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Патент на изобретение мотобуксировщика.jpg 1,000 × 710; 208 KB
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Патент №1827140.jpg 1,654 × 2,338; 592 KB