Drilldown: Patents

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Patents > Office : AU or CU or FI or US & Applicant is inventor: Yes & Tech fields : Airship or frame & Grant date: 1910 - 1919 & Family year: 1909 & Number of text pages: 3-4

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USPC 244/87 (3) · USPC 244/20 (3) · USPC 244/139 (2) · USPC 244/89 (2) · USPC 244/233 (2) · USPC 244/93 (2) · USPC 244/6 (2)
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