Drilldown: Patents
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Patents > Year filed:
1917
& Office :
DE or
US
& Supplementary to patent :
DE79446 or
None
& IPCs :
IPC B64B1/58 or
IPC B64C11/00 or
IPC B64C27/04 or
IPC B64C3/54
& Family year:
1910 - 1919
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Showing below up to 5 results in range #1 to #5.