Drilldown: Patents
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Patents > Supplementary to patent :
1913-01-23 or
Patent US-1909-970771
& Related to aircraft :
Yes or
frame
& CPCs :
CPC B64B1/58 or
CPC B64C23/005
& Family year:
1910 - 1919
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Showing below up to 1 result in range #1 to #1.