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Patents > Year filed: 1908 & National tech categories: FR 6.4 & First filing: Yes

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None (3) · Léon Dufour (2) · Louis Marmonier (2) · Gottlieb Burckhardt (2) · Marie-François-Pierre Vialard-Goudou (2)
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None (3) · Léon Dufour (2) · Marie-François-Pierre Vialard-Goudou (2) · Gottlieb Burckhardt (2)
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None (5)
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CPCs:
CPC B64C39/00 (14) · CPC B64B1/00 (11) · CPC B64C33/02 (8) · CPC B64C2700/6295 (8) · CPC B64C23/005 (8) · CPC B64C2700/6274 (7) · CPC B64C11/006 (6) · CPC B64C2700/6281 (6) · CPC B64C17/00 (5) · CPC B64B1/58 (5) · CPC B64C27/04 (4)
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