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US Patent: 2,335,602
Collapsible mandrel
Patentees: George A. Martin (exact or similar names) - Salem, OH Leonard W. Nash (exact or similar names) - Damascus, OH USPTO Classifications: 242/573.8, 242/574.1 Tool Categories: metalworking machines : sheet metal Assignees: E. W. Bliss Co. - Brooklyn, NY Manufacturer: E. W. Bliss Co. - Brooklyn, NY Witnesses: Unknown	Patent Dates: Applied: Jun. 27, 1938 Granted: Nov. 30, 1943 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for E. W. Bliss Co.
Description: See also patent 2,268,125, which is a sheet metal coiling machine that uses this collapsible mandrel.

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