Drilldown: Patents
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Patents > Year filed:
1892
& Office
:
DE
or
SU
or
UN
& Granted:
Yes
& Publication date:
1800 - 1899
& CPCs
:
CPC B64B1/00
or
CPC B64B1/40
or
CPC B64C33/02 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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Showing below up to 1 result in range #1 to #1.