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US Patent: 2,143,460
Knife adjustment in bread slicing machines
Patentees: Harry F. Caldwell (exact or similar names) - Grand Rapids, MI Howard B. Tuthill (exact or similar names) - Grand Rapids, MI USPTO Classifications: 83/751 Tool Categories: Assignees: Oliver Machinery Co. - Grand Rapids, MI Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 19, 1937 Granted: Jan. 10, 1939 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Oliver Machinery Co.

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