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US Patent: 1,511,574
Indicating and Recording Instrument
Patentee: Edvin H. Mortsell (exact or similar names) - Stockholm, Stockholm County, Sweden USPTO Classifications: 346/4, 346/49, 73/114.18 Tool Categories: propulsion and energy : internal combustion engines : internal combustion engine indicators industrial tools : pressure indicators industrial machines : industrial recording apparatus Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 24, 1920 Granted: Oct. 14, 1924 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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