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US Patent: 1,401,585
Spark Plug
Patentees: Archie F. Collins (exact or similar names) - Congers, Rockland County, NY Virgil D. Collins (exact or similar names) - Congers, Rockland County, NY USPTO Classifications: 123/169R, 313/125, 313/135, 313/143, 313/145, 33/813, 74/527 Tool Categories: propulsion and energy : internal combustion engines : ignition systems : spark plugs Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jun. 17, 1919 Granted: Dec. 27, 1921 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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