Drilldown: Patents
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Patents > Applicant type :
Hermann Burkardt or
INDIV or
INDIV + COMPANY or
Other
& Grant date:
1910 - 1919
& Related to aircraft:
Partially
& National tech categories:
None
& CPCs:
CPC F16H21/34
Use the filters below to narrow your results.
Showing below up to 1 result in range #1 to #1.