Drilldown: Patents
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Patents > Year filed:
1900 - 1909
& Office
:
AU
or
CU
or
SE
or
None
& Granted:
Yes
& National tech categories
:
DE 77h.2
or
None ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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None (1) ·
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Showing below up to 6 results in range #1 to #6.
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