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US Patent: 3,133,617
Hydraulic variable speed drive
Patentee:
Philip Hartmann (exact or similar names) - Racine, WI

USPTO Classifications:
192/58.91

Tool Categories:
work holding : vises : bench vises

Assignees:
Hartmann Manufacturing Co. - Racine, WI

Manufacturer:
Hartmann Manufacturing Co. - Racine, WI

Witnesses:
Unknown

Patent Dates:
Applied: Aug. 28, 1961
Granted: May 19, 1964

Patent Pictures:
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"Vintage Machinery" entry for Hartmann Vise Co.
Description:
This patent has improvements to patent 2,679,306. The assignee, Hartmann Manufacturing Co., was earlier named the Hartmann Vise Co.

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