US Patent: 2,189,422 - Combined drilling and tapping machine


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US Patent: 2,189,422

Combined drilling and tapping machine

Patentee:

George W. Irwin (exact or similar names) - Holland, OH

USPTO Classifications:

408/9, 470/181

Tool Categories:

metalworking machines : drilling and boring : drill presses

metalworking machines : drilling and boring : tapping machines

woodworking machines : wood drilling and boring : drill presses

Assignees:

Toledo General Mfg. Co. - Toledo, OH

Manufacturer:

Toledo General Mfg. Co. - Toledo, OH

Witnesses:

Unknown

Patent Dates:
Applied:	Aug. 29, 1938
Granted:	Feb. 06, 1940

Patent Pictures:

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Vintage Machinery entry for Demco Machine Tool Co.

Description:

The assignee acquired drilling machine maker Demco Machine Tool Co. in the early 1930s; the drilling machine in the patent was sold under the "Demco" brand.