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US Patent: 2,991,558
Air Gage Cartridge
Patentee: Paul Cherkas (exact or similar names) - West Hartford, Hartford County, CT USPTO Classifications: 33/785 Tool Categories: metalworking tools : machinist tools : measuring tools : pneumatic measuring gauges Assignees: Pratt & Whitney Co. - West Hartford, Hartford County, CT Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jul. 31, 1958 Granted: Jul. 11, 1961 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Pratt, Whitney & Co.

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