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Patents > National tech categories : BE K or CH 129a or GB 4 propel & steer

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Airplane (149) · None (106) · LTA (99) · propellers (76) · propulsion (72) · design (62) · hybrid (61) · Frame (38) · wings (38) · navigation (34) · stability (34) · rudder (31) · Control (28) · propeller (27) · subsystem (26) · construction (25) · aerodynamics (23) · sustentation (20) · ascension (20)
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None (247) · Patent BE-1909-214032 (32) · Patent BE-1907-199348 (15) · Patent BE-1907-197626 (3) · Patent BE-1913-255172 (3) · Patent GB-1913-16499 (2) · Patent BE-1910-225558 (2) · Patent FR-1913-468076 (2) · Patent BE-1909-218585 (2) · Patent FR-1913-467415 (2) · Patent FR-1900-299924 (2) · Patent GB-1885-339 (2) · Patent FR-1911-430455 (2) · Patent FR-1911-426626 (2) · Patent US-1913-1087946 (2) · Patent BE-1913-259683 (2)
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None (141) · A. Wunderlich & Cie, Ingénieurs-Conseils (56) · Raclot (22) · Duvinage (21) · J. Gevers (16) · Kirkpatrick (12) · De Visscher et Graetz (11) · Biebuyck (8) · E. et G. Bede (8) · Raclot et Cie (6) · Gernaert (5) · E. Blum & Co. (5) · Verhaeghen (4) · H. Kirchhofer (4) · Wunderlich (4) · Borghans-von Kilch et Cie (4) · le Comptoir indus. et tech. (anc. maison Picard) (3) · Rest (3) · Parette (3) · R. Wittebolle, Brussels, Belgium (3)
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