Drilldown: Patents
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Patents > Year filed:
1911
& Filing date:
June 1911
& Supplementary to patent :
Patent US-1913-04-21 George Raymond Lawrence or
None
& National tech categories :
AT 77d or
FR 6.4 or
USPC 244/119
& CPCs :
CPC B64C13/00 or
CPC B64C2700/6218 or
CPC B64C3/00 or
CPC B64C35/00
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