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US Patent: 1,660,579
Drill attachment Hammer drill attachment for electric drill
Patentee: Joseph Roth (exact or similar names) - New York, NY USPTO Classifications: 173/203, 74/56 Tool Categories: handheld power tools : handheld power tool accessories Assignees: Harold I. Williams - New York, NY Joseph Roth - New York, NY Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 16, 1927 Granted: Feb. 28, 1928 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin
Description: Conversion Tool

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