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US Patent: 2,249,438
Instrument Case Lock
Patentee: Norman J. Smith (exact or similar names) - Medfield, Norfolk County, MA USPTO Classifications: 292/108, 292/241, 70/135, 70/78 Tool Categories: industrial machines : industrial recording apparatus gauges Assignees: Crosby Steam Gage & Valve Co. - Boston, Suffolk County, MA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 21, 1939 Granted: Jul. 15, 1941 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Crosby Steam Gage & Valve Co.

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