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US Patent: 172,183
Depthing Tool
Patentee:
Augustus Schwerter (exact or similar names) - New York, NY

USPTO Classifications:
29/10, 82/128

Tool Categories:
metalworking machines : drilling and boring : boring heads

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Nov. 04, 1875
Granted: Jan. 11, 1876

Patent Pictures:
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