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US Patent: 2,919,902
Hollow drill Masonry drill
Patentee: Milton J. Steffes (exact or similar names) - Dearborn, MI USPTO Classifications: 175/394, 175/398, 175/403, 175/420.1, 175/421 Tool Categories: Assignees: Van Norman Industries, Inc. - Springfield, MA Manufacturer: Van Norman Industries, Inc. - Springfield, MA Witnesses: Unknown	Patent Dates: Applied: Mar. 31, 1955 Granted: Jan. 05, 1960 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Van Norman Machine Tool Co.

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