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Patents > Full specification filed date: 1960 - 1969 & CPCs : CPC B64C23/005 or None

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1 (9) · None (5) · navigation (3) · 1911-02-14 (2) · 1911-05-09 (2) · 1912-01-23 (2) · landing (2)
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None (13) · 1 (4)
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