Drilldown: Patents
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Patents > Office:
AU
& Inventor country :
AT or
ES or
NL
& Grant date:
1893
& National tech categories :
FR 6.2 or
Klasse 77 or
USPC 244/22
& IPCs:
None
& Family year:
1890 - 1899
& Number of figures:
1-2
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