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US Patent: 829,488
Mandrel-press
Patentee: Corneil Ridderhof (exact or similar names) - Grand Rapids, MI USPTO Classifications: 100/289, 29/251 Tool Categories: metalworking machines : metalworking presses : screw presses Assignees: Wilmarth & Morman Co. - Grand Rapids, MI Manufacturer: Wilmarth & Morman Co. - Grand Rapids, MI Covel Mfg. Co. - Benton Harbor, MI Witnesses: F. Guy Bruton Theoda S. Vincent	Patent Dates: Applied: Dec. 19, 1902 Granted: Aug. 28, 1906 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Wilmarth & Morman Co.

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