Drilldown: Patents

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Patents > Year granted: 1920 - 1929 & Tech fields: propulsion

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CPCs:
None (9) · CPC B64C23/005 (4) · CPC B64C11/00 (4) · CPC B64C2700/6274 (3) · CPC B64C11/20 (2) · CPC B64C11/36 (2) · CPC B64C11/22 (2) · CPC B64D27/00 (2) · CPC B64D27/04 (2) · CPC F03D3/067 (2) · CPC B64C11/04 (2) · CPC F05B2240/211 (2) · CPC F05B2260/72 (2)
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Showing below up to 46 results in range #1 to #46.

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