Drilldown: Patents
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Patents > Office :
FR or
NZ or
SU or
US
& Applicant type:
INDIV
& Filing date:
1917
& Publication date:
1919
& IPCs :
IPC B64C3/00 or
IPC B64C3/18 or
IPC B64C31/06 or
IPC B64C39/00
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