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Patents > Publication date: 1912 & CPCs: None & Number of text pages: 1-2

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None (9) · August Wendtland (2) · Paul Fugairon (2) · Joseph Wetterwald (2) · Heinrich Dittmar (2) · Adolf Warchalowski (2) · Donát Bánki (2) · William Swart Romme (2) · Antoine-Padoue Filippi (2)
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None (24) · Donát Bánki (2) · Joseph Wetterwald (2) · Heinrich Dittmar (2) · William Swart Romme (2)
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