Drilldown: Patents
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Patents > Inventor country:
DE
& Publication date:
1919
& Supplementary to patent :
Patent FR-1916-502839 or
Patent GB-1911-29012 or
None
& Assigned to :
Western Electric Company or
None
& IPCs :
IPC B64C3/18 or
IPC B64C35/00
& Number of figures:
3-5
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