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US Patent: 1,507,272
Internal Expansion Gauge
Patentee: Earle Buckingham (exact or similar names) - Hartford, CT USPTO Classifications: 33/501.4 Tool Categories: layout tools : measurement gauges Assignees: Pratt & Whitney Co. - New York, NY Manufacturer: Not known to have been produced Witnesses: none listed	Patent Dates: Applied: Jul. 10, 1920 Granted: Sep. 02, 1924 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Pratt, Whitney & Co.
Description: S. J. Teller - patent attorney

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