Drilldown: Patents

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Patents > Year filed: 1916 & Year granted: 1920 - 1929 & Number of text pages: 1-2

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None (15) · CPC B64C3/00 (3) · CPC B64C1/12 (2) · CPC B64C11/20 (2) · CPC B64C23/005 (2) · CPC B64C2700/6235 (2) · CPC B64B1/64 (2)
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