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US Patent: 89,652
Improvement in self-oiling pulleys
Patentees: Henry J. Colburn (exact or similar names) - Fitchburg, MA James Goodrich (exact or similar names) - Fitchburg, MA USPTO Classifications: 384/388 Tool Categories: industrial machines : industrial machine mechanisms : industrial machine pulleys and belt drive mechanisms Assignees: Rollstone Machine Works - Fitchburg, MA Manufacturer: Rollstone Machine Works - Fitchburg, MA Witnesses: E. G. Spaulding Thomas H. Dodge	Patent Dates: Granted: May 04, 1869 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Rollstone Machine Works

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