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US Patent: 514,719
Boring-mill
Patentee:
Charles Leon Libby - Bridgeport, CT

USPTO Classifications:
408/234, 409/190, 82/122

Tool Categories:
metalworking machines : drilling and boring : vertical boring mills

Assignees:
Edward P. Bullard - Bridgeport, CT

Manufacturer:
Bridgeport Machine Tool Works - Bridgeport, CT
Bullard Machine Tool Co. - Bridgeport, CT

Witnesses:
A. J. Tanner
M. C. Hinchcliffe

Patent Dates:
Applied: Dec. 05, 1892
Granted: Feb. 13, 1894

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Bridgeport Machine Tool Works
"Vintage Machinery" entry for Bullard Machine Tool Co.

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