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US Patent: 1,257,561
Chamering Device for Rock Drills
Patentee:
Wilhelm Weber (exact or similar names) - Hayingen, Lorraine, Germany

USPTO Classifications:
175/212, 175/285, 175/401, 175/407

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Jean Grund
Harry E. Carlson
Patent Dates:
Applied: Dec. 30, 1916
Granted: Feb. 26, 1918

Patent Pictures:
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