Drilldown: Patents
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Patents > Applicant type :
1 or
Hermann Burkardt or
INDIV
& Filing date:
1917
& Granted:
Yes
& Supplementary to patent:
Patent GB-1911-29012
& National tech categories:
None
& IPCs :
IPC B64C3/38 or
IPC B64C3/54 or
IPC B64C39/00
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