Drilldown: Patents
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Patents > Office
:
AT
or
DE
or
None
& Applicant type
:
INDIV
or
INIV
& Publication date:
1800 - 1899
& CPCs
:
CPC B64B1/40
or
CPC B64C2700/6256
or
CPC B64C3/00
& Family year:
1892
& Citations from after 1930:
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