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US Patent: 1,794,340
Optical Measuring Device
Patentee: Malcolm K. Parkhurst (exact or similar names) - New York, NY USPTO Classifications: 250/234, 33/549, 359/227, 451/6, 451/8 Tool Categories: layout tools : measurement gauges Assignees: Brown & Sharpe Mfg. Co. - Providence, RI Manufacturer: Not known to have been produced Witnesses: none listed	Patent Dates: Applied: Dec. 28, 1928 Granted: Feb. 24, 1931 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Brown & Sharpe Mfg. Co.
Description: Joseph A. Miller - patent attorney

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