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US Patent: 292,316
Mandrel attachment for circular saws Adapter for wobble dadoing
Patentee: Edward W. Johnson (exact or similar names) - Waterbury, CT USPTO Classifications: 144/238 Tool Categories: woodworking machines : circular saws : circular saw accessories Assignees: None Manufacturer: Not known to have been produced Witnesses: Orson Hayward Willis Johnson	Patent Dates: Applied: Aug. 27, 1883 Granted: Jan. 22, 1884 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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