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US Patent: 2,921,439
Pump Control
Patentee:
Frederick G. Krafft (exact or similar names) - Springfield, Clark County, OH

USPTO Classifications:
418/26, 60/427, 60/450

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: Jun. 26, 1957
Granted: Jan. 19, 1960

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Thompson Grinder Co.

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