Drilldown: Patents

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Patents > Office : AT or US & Filing date: 1860 - 1869

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Inventors:
William R. Manley (2) · William H. Holland (2) · Halvor Halvorson (2)
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None (10) · USPC 244/3.23 (7) · USPC 244/153R (4) · USPC 416/194 (3) · USPC 244/30 (2)
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