Drilldown: Patents

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Patents > National tech categories: DE 77 & First filing: No

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Office:
Inventors:
Henry Boinet (2) · Rudolf Chillingworth (2) · Carl Alfred Johansson (2)
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Applicant is inventor:
Tech fields:
LTA (31) · balloon (14) · propulsion (13) · navigation (11) · car (11) · frame (10) · propeller (6) · stability (5) · dirigible (4) · flapping (3) · None (3)
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Cites these patents:
Citations from after 1930:
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