Drilldown: Patents
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Patents > Year granted:
1910 - 1919
& Office :
DE or
NL or
UN
& Supplementary to patent :
DE79446 or
Patent NO-1915-12-15 Carl Alfred Johansson or
None
& IPCs:
IPC B64C25/58
& Family year:
1917
& Number of diagram pages:
1
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Showing below up to 1 result in range #1 to #1.