Drilldown: Patents

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Patents > Inventor country : BE or None & Applicant type : COMPANY or INDIV or Other & Granted: Yes & Family year: 1800 - 1899 & First filing: No & Citations from after 1930: None

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navigation (12) · Propulsion (9) · balloon (7) · airship (6) · aerostat (5) · LTA (4) · dirigible (4) · steam (3) · stability (3) · centrifuge (2)
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