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US Patent: 920,472
Testing Attachment for Spring Loaded Valves
Patentee: William E. Jerauld (exact or similar names) - Boston, Suffolk County, MA USPTO Classifications: 137/522, 137/542 Tool Categories: specialty machines : testing machines Assignees: American Steam Gauge & Valve Mfg. Co. - Boston, Suffolk County, MA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Aug. 20, 1908 Granted: May 04, 1909 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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