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Patents > Office : DE or GB & Inventor country: BE

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Tech fields:
propulsion (7) · Airplane (7) · None (6) · frame (5) · construction (4) · wings (4) · LTA (4) · lift (4) · design (4) · sustentation (3) · hybrid (3) · balloon (3)
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Showing below up to 28 results in range #1 to #28.

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