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US Patent: 1,928,001
Projection Indicator Measuring Instrument
Patentees: Erik H. Aldeborgh (exact or similar names) - Poughkeepsie, NY Park D. Ritchey (exact or similar names) - Poughkeepsie, NY Lawrence G. Spealman (exact or similar names) - Poughkeepsie, NY Christian E. Ruf (exact or similar names) - Poughkeepsie, NY USPTO Classifications: 353/40 Tool Categories: Assignees: Standard Gage Co., Inc. - Poughkeepsie, NY Manufacturer: Standard Gage Co., Inc. - Poughkeepsie, NY Witnesses: Unknown	Patent Dates: Applied: Sep. 15, 1931 Granted: Sep. 26, 1933 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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