Drilldown: Patents
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Patents > Year filed:
1911
& Supplementary to patent:
None
& National tech categories :
AT 77d or
FR 6.4 or
GB 4 propel & steer or
USPC 244/119
& CPCs:
CPC B64C13/00
& Number of diagram pages:
3
Use the filters below to narrow your results.
Showing below up to 2 results in range #1 to #2.