Drilldown: Patents
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Patents > Year filed:
1900 - 1909
& Applicant type :
INDIV or
А. Нейфельд
& Supplementary to patent :
Patent DE-1899-123884 or
None
& National tech categories :
FR 6.3 or
HU V/h or
USPC 244/153R
& IPCs :
IPC B64C1/00 or
IPC B64C17/00 or
IPC B64C23/00
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