Drilldown: Patents
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Patents > Year granted:
1880 - 1889
& Filing date:
1800 - 1899
& National tech categories:
USPC 336/192
& Number of text pages:
1-2
& Number of claims:
4-7
& Number of diagram pages:
0-20
Use the filters below to narrow your results.
Showing below up to 1 result in range #1 to #1.