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US Patent: 680,985
Multiple Piston Explosive Engine
Patentee: William S. Sharpneck (exact or similar names) - Chicago, Cook County, IL USPTO Classifications: 123/190.4, 123/197.1, 123/51A, 123/51R, 123/53.1 Tool Categories: propulsion and energy : internal combustion engines Assignees: William S. Sharpneck - Chicago, Cook County, IL John D. Ross - Chicago, Cook County, IL Everett W. Brooks - Chicago, Cook County, IL Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Dec. 13, 1900 Granted: Aug. 20, 1901 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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