Drilldown: Patents
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Patents > Office
:
AH
or
AT
& Filing date:
1915
& Supplementary to patent
:
Patent AT-1911-57225
or
None
& Assigned to:
None
& National tech categories
:
AT 46b
or
AT 77d
& Number of text pages:
2-3 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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