Drilldown: Patents
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Patents > Office
:
BE
or
CU
or
MX
or
Other
& Grant date:
1920 - 1929
& Supplementary to patent:
None
& CPCs
:
CPC B64C2700/6256
or
CPC B64C33/02
or
CPC F02K1/28
& Number of figures:
None ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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None (2) ·
Alliott Verdon Roe (1) ·
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Henry O. Watts (1) ·
Hermann Werner (1) ·
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Showing below up to 17 results in range #1 to #17.