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US Patent: 476,677
Dado-head
Patentee: Joseph W. Oliver (exact or similar names) - Grand Rapids, MI USPTO Classifications: 144/222 Tool Categories: woodworking machines : machine and tool cutters : cutterheads Assignees: None Manufacturer: American Machinery Co. (Grand Rapids) - Grand Rapids, MI Oliver Machinery Co. - Grand Rapids, MI Witnesses: Ithiel J. Cilley E. McWhinney	Patent Dates: Granted: Jun. 07, 1892 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Oliver Machinery Co. Vintage Machinery entry for American Machinery Co. (Grand Rapids)
Description: From the founder of Oliver Machinery Co., an adjustable-width dado cutter. Witness Cilley was an attorney.

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