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US Patent: RE20,974
Metal Working Apparatus
Patentees:
Paul R. Guirl (exact or similar names) - Rockford, Winnebago County, IL
John S. Barnes (deceased, estate of) (exact or similar names) - Rockford, Winnebago County, IL

USPTO Classifications:
82/130

Tool Categories:
metalworking machines : pipe cutting machines

Assignees:
W. F. & John Barnes Co. - Rockford, Winnebago County, IL

Manufacturer:
Cincinnati Grinders, Inc. - Cincinnati, Hamilton County, OH

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 10, 1935
Granted: Jan. 10, 1939

Reissue Information:
Reissue of 2,030,562 (Feb. 11, 1936)

Patent Pictures: [ 1 | 2 | 3 | 4 ]
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"Vintage Machinery" entry for W. F. & John Barnes Co.
Description:
This patent was seen on a patent plate of a Cincinnati Cylindrical Grinder.

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