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Patents > Office : BE or CA or RU & Supplementary to patent: None

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Tech fields:
airplane (122) · design (68) · LTA (55) · propellers (47) · propulsion (44) · stability (43) · frame (43) · control (39) · wings (39) · aerodynamics (31) · hybrid (27) · rudder (24) · construction (22) · propeller (21) · navigation (19) · helicopter (19) · lift (18) · steering (16) · balloon (15) · subsystem (15)
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Patent agent:
None (198) · Raclot (16) · A. Wunderlich & Cie, Ingénieurs-Conseils (16) · Duvinage (13) · De Visscher et Graetz (7) · Kirkpatrick (7) · Raclot et Cie (6) · E. et G. Bede (6) · J. Gevers (6) · Gernaert (4) · Munn & Co. (4) · Rest (3) · R. Wittebolle, Brussels, Belgium (3) · Parette (3) · Wunderlich (3) · Borghans-von Kilch et Cie (3) · Biebuyck (3)
National tech categories:
BE K (188) · None (63) · RU Group V (14) · CA 244/24 (6) · CA 341/80 (3) · CA 244/11 (3) · CA 244/35 (3) · CA 244/4 (2) · CA 244/21 (2) · CA 244/12 (2) · CA 244/34 (2) · RU 62a (2) · CA 46/28 (2)
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Citations from after 1930:
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