Drilldown: Patents
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Patents > Year granted:
1912
& Office:
FR
& National tech categories :
FR 6.2 or
FR 6.4 or
HU V/h
& IPCs :
IPC B64C13/00 or
None
& Number of diagram pages:
1-2
& Number of figures:
5-9
Use the filters below to narrow your results.
Showing below up to 3 results in range #1 to #3.