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Patents > Filing date: 1912 & National tech categories: FR 6.4 & IPCs: IPC B64C17/00

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Walter Borchardt (2) · Édouard Baril (2) · Albéric de la Celle (2) · Gaston-Marie-Eugène Balignant (2) · Marcel Linzeler (2) · Marianne Burkhardt (2) · Jean-François Arnaud (2) · Roger Chechère (2)
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Walter Borchardt (2) · Édouard Baril (2) · Albéric de la Celle (2) · Gaston-Marie-Eugène Balignant (2) · Marcel Linzeler (2) · Marianne Burkhardt (2) · Jean-François Arnaud (2) · Roger Chechère (2)
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