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Patents > Year granted: 1920 - 1929 & CPCs : CPC B64B1/58 or CPC B64C23/005

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None (20) · airplane (5) · LTA (5) · design (4) · propulsion (4) · construction (4) · heavier-than-air (3) · airship (3) · ascension (3) · dirigible (3) · propellers (3) · navigation (2) · gas (2) · frame (2) · Fabric (2) · landing (2)
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Showing below up to 39 results in range #1 to #39.

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