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US Patent: 3,783,970
Sound Attenuating device for a work steel or the like
Patentee: Irvin R. Danielson (exact or similar names) - Burr Ridge, IL USPTO Classifications: 173/211, 181/207 Tool Categories: Assignees: Thor Power Tool Co. - Aurora, IL Manufacturer: Thor Power Tool Co. - Aurora, IL Witnesses: Unknown	Patent Dates: Applied: Jun. 07, 1972 Granted: Jan. 08, 1974 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Thor Power Tool Co.

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