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US Patent: 968,372
Ball-bearing
Patentee:
George O. Leopold (exact or similar names) - Philadelphia, PA

USPTO Classifications:
384/617

Tool Categories:
woodworking machines : specialty woodworking machines : tool making machines

Assignees:
North Brothers Manufacturing Co. - Philadelphia, PA

Manufacturer:
Not known to have been produced

Witnesses:
Henry Howson
William A. Barr

Patent Dates:
Applied: Aug. 27, 1909
Granted: Aug. 23, 1910

Patent Pictures:
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