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Patents > Inventor country : BE or CA or US & Number of claims: None & Number of figures: 2-4

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Office:
Inventors:
Joseph Allison Steinmetz (4) · William Swart Romme (2) · Gustave Whitehead (2) · George Raymond Lawrence (2)
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Tech fields:
airplane (16) · frame (7) · LTA (7) · stability (6) · propeller (6) · None (5) · whole (4) · kite (4) · rudder (3) · parachute (3) · navigation (3) · airfoil (3) · Propulsion (3)
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National tech categories:
FR 6.4 (8) · None (4) · AT 77d (3) · BE K (3) · USPC 244/52 (2)
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Citations from after 1930:
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