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US Patent: 1,527,757
Automatic chock
Automatic chuck
Patentee:
James A. Street - Pontiac, MI

USPTO Classifications:
192/56.57, 279/158, 464/36

Tool Categories:
woodworking machines : handheld power tools : handheld power tool accessories

Assignees:
Hugo C. Zietz - Detroit, MI
James A. Street - Pontiac, MI

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: May 16, 1921
Granted: Feb. 24, 1925

Patent Pictures:
USPTO pdf tiff
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