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Patents > Year filed: 1907 & Office : DE or GB or SE or US or Other & Inventor country : CH or US & Tech fields : airplane or balloon or wings

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None (3) · USPC 244/93 (2) · USPC 244/218 (2) · USPC 244/52 (2) · USPC 244/12.1 (2) · USPC 244/34R (2) · USPC 244/25 (2) · IT 8 (2) · FR 6.4 (2) · CH 129b (2)
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