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US Patent: 829,551
Pressure Gage
Patentee: George Spencer (exact or similar names) - Medford, Middlesex County, MA USPTO Classifications: 73/741 Tool Categories: gauges : vacuum and pressure gauges Assignees: Crosby Steam Gage & Valve Co. - Boston, Suffolk County, MA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Feb. 06, 1905 Granted: Aug. 28, 1906 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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