Drilldown: Patents
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Patents > Year filed:
1890 - 1899
& Filing date:
May 1899
& Application number :
423792D or
car or
None
& National tech categories :
AT 77d or
FR 6.2 or
USPC 244/30
& First filing:
No
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Showing below up to 1 result in range #1 to #1.