Drilldown: Patents
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Patents > Year filed:
1906
& Assigned to:
None
& National tech categories
:
DE 77h
or
FR 6.4
or
USPC 244/3.23
& CPCs
:
CPC B64B1/58
or
CPC B64C17/00
or
CPC B64C39/005
& Number of text pages:
1-2 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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