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US Patent: 1,861,498
Boring Head
Patentee:
Robert L. Hibbard (exact or similar names) - Bellevue, Allegheny County, PA

USPTO Classifications:
408/200

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

Assignees:
Robert L. Hibbard - Bellevue, Allegheny County, PA
William K. Stamets - Pittsburgh, Allegheny County, PA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Mar. 16, 1931
Granted: Jun. 07, 1932

Patent Pictures:
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