Drilldown: Patents

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Patents > Office: DE & Applicant person: None & National tech categories : DE 77 or USPC 244/80 & Number of text pages: 2-3

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LTA (21) · navigation (12) · propulsion (12) · frame (9) · balloon (9) · car (9) · propeller (6) · hydrogen (4) · stability (3) · dirigible (3) · electricity (3) · flapping (3) · gas (3)
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Showing below up to 34 results in range #1 to #34.

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