Drilldown: Patents

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Patents > Office : DE or DK or IT or NO or US & Applicant is inventor: Yes & Tech fields : airplane or balloon or frame & Granted: Yes & Assigned to: None & Citations from after 1930: 3-2000

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National tech categories:
USPC 244/97 (3) · None (2) · USPC 244/131 (2) · USPC 244/35R (2) · USPC 244/49 (2)
CPCs:
CPC B64B1/00 (2)
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