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US Patent: 1,535,048
Chucking Mechanism
Patentee:
William F. Schumer (exact or similar names) - Cincinnati, OH

USPTO Classifications:
279/155, 279/53

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Apr. 16, 1923
Granted: Apr. 21, 1925

Patent Pictures:
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