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US Patent: 555,604
Feed Screw for Rock Drills
Patentee:
William Almond Keyser (exact or similar names) - Granite Mountain, Burnet County, TX

USPTO Classifications:
74/441

Tool Categories:
stoneworking : stone boring and drilling machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jun. 05, 1895
Granted: Mar. 03, 1896

Patent Pictures:
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