Drilldown: Patents
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Patents > Grant date:
1900 - 1999
& CPCs
:
CPC B64B1/00
or
CPC B64B1/40
or
CPC B64C17/00
or
CPC B64C2700/6274
or
CPC B64C33/02
& Citations from after 1930:
2-7
& Number of text pages:
1-2 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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