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Patents > National tech categories : BE K or FR 5 or USPC 244/51

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Airplane (184) · LTA (141) · propellers (99) · design (88) · Propulsion (73) · hybrid (67) · navigation (65) · stability (47) · wings (47) · frame (42) · control (42) · balloon (41) · aerodynamics (34) · construction (33) · rudder (29) · sustentation (26) · lift (22) · None (22) · steering (21)
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None (359) · Patent BE-1909-214032 (32) · Patent BE-1907-199348 (15) · Patent BE-1913-255172 (3) · Patent BE-1907-197626 (3) · Patent FR-1900-299924 (2) · Patent FR-1850-10514 (2) · Patent FR-1913-467415 (2) · Patent FR-1913-468076 (2) · Patent BE-1913-259683 (2) · Patent FR-1911-426626 (2) · Patent BE-1910-225558 (2) · Patent BE-1909-218585 (2) · Patent FR-1911-430455 (2)
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None (233) · A. Wunderlich & Cie, Ingénieurs-Conseils (56) · Raclot (22) · Duvinage (21) · J. Gevers (15) · Kirkpatrick (12) · De Visscher et Graetz (11) · Biebuyck (8) · E. et G. Bede (8) · Jules Mathieu (6) · Raclot et Cie (6) · Gernaert (5) · Verhaeghen (4) · Édouard Baral (4) · Wunderlich (4) · Borghans-von Kilch et Cie (4)
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