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Privilege, issued on July 31, 1913. Description of the method of transmission of light images in electric telescopes and the like: Class 42 h: No. 24469: Declared. 03.02.1911: Granting of the privilege 31.07.1913 / B. Rosing. - [St. Petersburg]: [Lit. K. Heinrichsen], [1913]. -8 seconds, 1 liter. Features. -
Bibliography. in the text.
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I. Rosing, B. 1. The people (the collection). |
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Source of electronic copy: PB
Location of the original: FIPS |
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Ru