Drilldown: Patents

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Patents > Year granted: 1920 - 1929 & Number of text pages: 4-50000000 & Number of figures: 14-100

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None (7)
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CPC B64C17/00 (7) · CPC B64C3/00 (5) · CPC B64C2700/6212 (4) · CPC B64C2700/6233 (3) · CPC B64C35/00 (3) · CPC B64B1/40 (3) · CPC B64C13/00 (2) · CPC B64C2700/6235 (2) · CPC B64C19/00 (2) · None (2)
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