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US Patent: 1,598,088
Mechanical movement
Patentees:
James S. Knowlson (exact or similar names) - Oak Park, IL
James Larocca (exact or similar names) - Chicago, IL

USPTO Classifications:
173/118, 173/128, 173/98

Tool Categories:
handheld power tools : handheld impact tools : impact chisels and drills

Assignees:
Electro-Magnetic Tool Co. - Chicago, IL

Manufacturer:
Electro-Magnetic Tool Co. - Cicero, IL

Witnesses:
Unknown

Patent Dates:
Applied: Jul. 03, 1922
Granted: Aug. 31, 1926

Patent Pictures:
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Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Electro-Magnetic Tool Co.

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