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Patents > Patent agent : H. Bœttcher fils or Haseltine, Lake & Co. & Number of diagram pages: 2

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airplane (13) · stability (9) · LTA (7) · None (4) · design (4) · military (4) · frame (4) · gyroscope (3) · car (3) · marine (3) · propeller (3) · ballonet (3)
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