Olszewski Stanisław US patent 1887 3

Autor:

Nikołaj Benardos, Stanisław Olszewski (1852-1898)

Credit:

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.

Krótki link:

https://plwiki.pl/b/72e4f

źródło:

Wikimedia Commons

Wymiary:

1798 x 3058 Pixel (1027560 Bytes)

Opis:

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.

Licencja:

Public domain