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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: USPTO (New site tip) Google Patents Report data errors or omissions to steward Carl Matthews "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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