Drilldown: Patents
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Patents > Year granted:
1910 - 1919
& Office :
AH or
CA or
GB
& Inventor country:
RU
& Applicant type :
Hermann Burkardt or
INDIV or
None
& First filing:
Yes
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aerial propeller (1) ·
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Showing below up to 12 results in range #1 to #12.