Drilldown: Patents
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Patents > Applicant type :
Hermann Burkardt or
INDIV or
INDIV + COMPANY
& Grant date:
1890 - 1899
& Supplementary to patent:
None
& CPCs :
CPC B64B1/40 or
CPC B64C2700/6212
& Number of claims:
4
Use the filters below to narrow your results.
Showing below up to 3 results in range #1 to #3.