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US Patent: 1,257,532
Hand Operated Apparatus for Rotating Drills or Other Rotary Tools or Implements
Patentee:
Allan Risk (exact or similar names) - Newcastle-upon-Tyne, England

USPTO Classifications:
74/30

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Henry R. Putman
Bertha Putman
Patent Dates:
Applied: Aug. 28, 1917
Granted: Feb. 26, 1918

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