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Patents > Office : CH or Other

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US (3950) · FR (3876) · None (2577) · DE (1888) · GB (1553) · AT (335) · IT (288) · BE (268) · HU (204) · CH (173) · RU (135) · CA (128) · AU (96) · ES (55) · NL (50) · SE (48) · RO (45) · AH (43) · NO (39) · NZ (36)
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Tech fields:
None (15770) · LTA (14) · airplane (12) · propellers (7) · propulsion (6) · navigation (6) · control (5) · stability (5) · aerodynamics (4) · wings (4) · frame (4) · propeller (3) · monoplane (3) · Lift (3) · Design (3) · landing (3)
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