Drilldown: Patents
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Patents > Grant date:
1900 - 1999
& IPCs :
IPC B64B1/00 or
IPC B64C33/00 or
IPC B64C33/02
& CPCs:
CPC B64B1/00
& Family year:
1912
& Number of text pages:
2
Use the filters below to narrow your results.
Showing below up to 9 results in range #1 to #9.