Drilldown: Patents
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Patents > Office :
AT or
DE or
FI or
UN
& Inventor country :
DE or
GB
& Publication date:
1910 - 1919
& Family year:
1917
& Number of text pages:
1-2
& Number of figures:
1-2
Use the filters below to narrow your results.
Showing below up to 5 results in range #1 to #5.