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US Patent: 1,230,842
Tool for treating stone, concrete and other materials
Patentee:
John O. Berg (exact or similar names) - New York, NY

USPTO Classifications:
125/3, 125/5

Tool Categories:
handheld power tools

Assignees:
Rotary Power-Tool Co., Inc. - New York, NY

Manufacturer:
Aurand Mfg. & Equipment Co. - Cincinnati, OH
Concrete Surfacing Machinery Co. - Cincinnati, OH
Rotary Power-Tool Co., Inc. - New York, NY

Witnesses:
George H. Emslie
Everard B. Marshall

Patent Dates:
Applied: Mar. 13, 1915
Granted: Jun. 26, 1917

Patent Pictures:
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Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Aurand Mfg. & Equipment Co.

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