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US Patent: 166,743
Improvement in wet and dry ore crushers
Patentee: Henry Bolthoff (exact or similar names) - Central City, CO USPTO Classifications: 209/393, 241/91 Tool Categories: specialty machines : ore processing apparatus Assignees: Henry Bolthoff - Central City, CO Charles F. Hendrie - Central City, CO Manufacturer: Hendrie & Bolthoff Manufacturing & Supply CO. - Denver, CO Witnesses: Charles Withrow James Burrell	Patent Dates: Applied: May 01, 1875 Granted: Aug. 17, 1875 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Hendrie & Bolthoff Mfg. & Supply Co.

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