Drilldown: Patents
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Patents > Year filed:
1911
& Office
:
DE
or
FR
or
GB
& Grant date:
September 1911
& CPCs
:
CPC B64C13/00
or
CPC B64C2700/6212
or
CPC B64C2700/6218
& First filing
:
No
or
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Showing below up to 7 results in range #1 to #7.