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US Patent: 908,206
Differential Pressure Gage
Patentee: Charles H. Craig, Jr. (exact or similar names) - Boston, Suffolk County, MA USPTO Classifications: 73/716 Tool Categories: gauges : vacuum and pressure gauges Assignees: American Steam Gauge & Valve Mfg. Co. - Boston, Suffolk County, MA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 30, 1907 Granted: Dec. 29, 1908 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for American Steam Gauge Co.

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