Drilldown: Patents

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Patents > Application number: None & Publication date: 1920 - 1929 & First filing: No

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None (13) · Patent FR-1916-501550 (7) · Patent 1915-11-05 Käthe Paulus (2) · Patent US-1918-1589780 (2) · Patent CA-1918-192493 (2)
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