Object's details: Krążek do odgromników oraz sposób wyrobu takich krążków : opis patentowy : nr 19447 : Kl. 21 c, 72
Provider:Polona
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Niskoomowy zapalnik, zabezpieczony przed prądami błądzącemi : opis patentowy : nr 14491 : Kl. 78 e 3
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Creator:Wideröe, Rolf (1902-1996). Autor
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