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US Patent: 3,650,336
Power driven device
Patentee: Heinrich P. Koehler (exact or similar names) - Camillus, NY USPTO Classifications: 173/110, 173/201 Tool Categories: handheld power tools : handheld impact tools : impact chisels and drills Assignees: Rockwell Mfg. Co. - Pittsburgh, PA Manufacturer: Rockwell Mfg. Co. - Pittsburgh, PA Witnesses: Unknown	Patent Dates: Applied: May 05, 1970 Granted: Mar. 21, 1972 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Delta Specialty/Delta Mfg. Co./Delta-Rockwell/Rockwell Intl.

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