Drilldown: Patents

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Patents > Year granted: 1900 - 1909 & CPCs : CPC B64B1/40 or CPC B64C11/48

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None (2) · Henri-Alphonse-Désiré Hervé (2) · Joseph Allison Steinmetz (2) · Johann Stumpf (2)
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None (5) · Joseph Allison Steinmetz (2)
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None (7)
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