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US Patent: 2,216,800
Hydraulic Control Device
Patentee:
William G. Baldenhofer - Springfield, Clark County, OH

USPTO Classifications:
475/339, 91/375R, 91/391R, 91/445, 91/450

Tool Categories:
metalworking machines : metalworking machine mechanisms : hydraulic apparatus

Assignees:
Thompson Grinder Co. - Springfield, Clark County, OH

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: May 22, 1939
Granted: Oct. 08, 1940

Patent Pictures:
USPTO pdf tiff
Google Patents
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"Vintage Machinery" entry for Thompson Grinder Co.

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