Drilldown: Patents
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Patents > Year granted:
1920 - 1929
& IPCs :
IPC B64C25/00 or
IPC B64C31/06
& CPCs:
CPC B64F2700/6226
& Family year:
1913
Use the filters below to narrow your results.
Showing below up to 1 result in range #1 to #1.