Drilldown: Patents
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Patents > Year granted:
1890 - 1899
& National tech categories :
HU V/h or
USPC 244/130
& First filing:
No
& Number of text pages:
1-2
& Number of claims:
2
& Number of figures:
2-3
Use the filters below to narrow your results.
Showing below up to 2 results in range #1 to #2.