US Patent: 520,000 - Mining Tool


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US Patent: 520,000

Mining Tool

Patentee:

Martin Hardsocq (exact or similar names) - Ottumwa, IA

USPTO Classifications:

403/381

Tool Categories:

woodworking tools : hammers

wrenches : auxiliary wrenches

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Patent Dates:
Applied:	Jul. 10, 1893
Granted:	May 15, 1894

Patent Pictures:

Martin Hardsocq patent May 15, 1894

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Description:

The patent is for interchangeable heads on mining tools like picks and hammers. The attaching means is a socket head screw. The patent includes the matching wrench as shown in the drawings and noted in the specifications.