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US Patent: 1,521,014
Regulating device for percentage feeders
Patentee: Emil R. Draver (exact or similar names) - Richmond, IN USPTO Classifications: 222/134, 222/135, 222/286, 222/311 Tool Categories: Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Granted: Dec. 30, 1924 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Draver Mfg. Co.

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