Drilldown: Patents
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Patents > Office :
AU or
DE or
UN
& Inventor country:
DE
& CPCs :
CPC B64C2700/6235 or
CPC B64C2700/6273 or
CPC B64C3/00
& Family year:
1880 - 1889
Use the filters below to narrow your results.
Showing below up to 3 results in range #1 to #3.