Drilldown: Patents
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Patents > Office :
FR or
MX or
SAX
& CPCs :
CPC B64C2700/6212 or
CPC B64C2700/6235 or
CPC B64C39/00 or
CPC B64C39/005
& Family year:
1918
& Number of text pages:
2-3
Use the filters below to narrow your results.
Showing below up to 7 results in range #1 to #7.