File:Olszewski Stanisław US patent 1887 2.JPG

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English: Nikołaj Benardos, Stanisław Olszewski: "Process of and apparatus for working metals by the direct application of the electric current" patent nr 363 320. Washington: United States Patent Office, 17 may 1887.
Date
Source Nikołaj Benardos, Stanisław Olszewski: "Process of and apparatus for working metals by the direct application of the electric current" patent nr 363 320. Washington: United States Patent Office, 17 may 1887.
Author Nikołaj Benardos, Stanisław Olszewski (1852-1898)

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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
United States
United States
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