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US Patent: 2,814,540
Piston Packing
Patentee: Harold I. Southerwick (exact or similar names) - Whitefish Bay, WI USPTO Classifications: 415/217.1, 92/194, 92/250 Tool Categories: Assignees: Blackhawk Mfg. Co. - West Allis, WI Manufacturer: Not known to have been produced Witnesses: none listed	Patent Dates: Applied: Jul. 16, 1956 Granted: Nov. 26, 1957 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Stan Schulz
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