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Patents > National tech categories : DE 77h.5 or MX E.V., L. II & Number of figures: 3-4

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None (15) · Ernst Heinkel (4) · Anton Flettner (2) · Alexander Baumann (2)
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None (17) · Ernst Heinkel (4) · Claudius Dornier (2) · Anton Flettner (2)
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