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US Patent: 469,503
Boring Tool
Patentee:
John T. Kiehner - Philadelphia, PA

USPTO Classifications:
408/129

Tool Categories:
metalworking machines : drilling and boring : portable metal drilling machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Nov. 07, 1891
Granted: Feb. 23, 1892

Patent Pictures:
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