Drilldown: Patents
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Patents > Year granted:
1880 - 1889
& Applicant type:
INDIV
& Filing date:
1800 - 1899
& Assigned to:
None
& National tech categories
:
US 98
or
USPC 244/153R
& Number of text pages:
1-2
& Number of claims:
4-7
& Number of diagram pages:
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