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US Patent: 1,819,431
Apparatus for forming scroll-edge metal blanks
Patentee: Charles D. McDonald (exact or similar names) - Chicago, IL USPTO Classifications: 414/19, 83/255, 83/278, 83/406, 83/418, 83/437.1, 83/620 Tool Categories: Assignees: McDonald Machine Co. - Chicago, IL Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jul. 07, 1927 Granted: Aug. 18, 1931 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin

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