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Patents > Inventor country : DE or FR & Citations from after 1930: 3-30

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Tech fields:
None (7) · stability (5) · frame (3) · airplane (3) · projectile (3) · propulsion (3) · Navigation (2) · aerial propeller (2) · military (2) · cargo (2) · lift (2) · LTA (2) · ballistics (2) · automatic stability (2) · airfoil (2)
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National tech categories:
FR 6.4 (7) · None (6) · FR 6.2 (2) · USPC 244/3.28 (2) · USPC 244/3.21 (2) · USPC 244/90R (2)
CPCs:
CPC F42B10/50 (3) · CPC B64C3/14 (2) · CPC B64C3/56 (2)
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Showing below up to 35 results in range #1 to #35.

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