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US Patent: 1,491,523
Adjustable drilling and balancing tool
Patentee: Gustaf H. Ekstrom (exact or similar names) - Rockford, IL USPTO Classifications: 173/44, 173/50, 408/52, 73/480 Tool Categories: specialty machines : balancing machinery Assignees: Rockford Tool Co. - Rockford, IL Manufacturer: Rockford Tool Co. - Rockford, IL Witnesses: Unknown	Patent Dates: Applied: Jul. 26, 1919 Granted: Apr. 22, 1924 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Rockford Tool Co.

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