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US Patent: 3,396,860
Excavator and grader or crane apparatus
Patentees: Jay V. Wright (exact or similar names) - Menomonee Falls, WI Wallace J. Witwer (exact or similar names) - Waukesha, WI USPTO Classifications: 212/264, 414/718 Tool Categories: construction machines : excavators material handling : cranes construction machines : cranes transportation : heavy motor vehicles : graders and dozers Assignees: Hein-Werner Corp. - Waukesha, WI Manufacturer: Hein-Werner Corp. - Waukesha, WI Witnesses: Unknown	Patent Dates: Applied: Apr. 12, 1966 Granted: Aug. 13, 1968 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Hein-Werner Corp.
Description: Invention is a telescoping boom mechanism.

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