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US Patent: 28,627
Slotting Machine Machine for Cutting Key-Seats, &c.
Patentee: William B. Bement (exact or similar names) - Philadelphia, PA USPTO Classifications: 142/26, 142/47, 409/197, 409/203 Tool Categories: metalworking machines : key seating machines metalworking machines : metal slotting machines Assignees: William B. Bement - Philadelphia, PA James Dougherty - Philadelphia, PA Manufacturer: Bement & Dougherty - Philadelphia, PA Witnesses: Unknown	Patent Dates: Granted: Jun. 05, 1860 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Bement, Miles & Co.

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