Drilldown: Patents
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Patents > Office
:
BE
or
IT
or
MX
or
Other
& Grant date:
1911
& National tech categories:
USPC 244/45R
& IPCs
:
IPC B64C17/00
or
None
& First filing:
Yes
& Cites these patents
:
Patent GB-1901-346
or
None
& Citations from after 1930:
None
& Number of diagram pages:
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