Drilldown: Patents
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Patents > Grant date:
June 3, 1899
& Supplementary to patent:
Patent DE-1895-98580
& National tech categories
:
DE 77
or
USPC 244/80
& CPCs
:
CPC B64C2700/6235
or
CPC B64C2700/6295
or
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Showing below up to 1 result in range #1 to #1.