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US Patent: 4,926,557
Semi-automatic string trimmer head
Patentee: Eugene J. Haupt (exact or similar names) - Woodland Hills, CA USPTO Classifications: 30/276, 30/347 Tool Categories: Assignees: Allegretti & Co. - Chatsworth, CA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jul. 21, 1988 Granted: May 22, 1990 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Paramount Division of Allegretti & Co.

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