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US Patent: 139,487
Drill Gage
Patentee:
Alvah C. Trafton - Worcester, MA

USPTO Classifications:
33/201

Tool Categories:
woodworking tools : hand drills : drill accessories
layout tools : measurement gauges

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Joseph B. Gardiner
Nathan B. Goodnow

Patent Dates:
Applied: Mar. 10, 1873
Granted: Jun. 03, 1873

Patent Pictures:
USPTO pdf tiff
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