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CA Patent: CA-336,012
Hardness tester
Patentee: Charles H. Wilson (exact or similar names) - Pelham, NY USPTO Classifications: Tool Categories: metalworking tools : machinist tools : measuring tools : metal hardness testers Assignees: Wilson Mechanical Instrument Co., Inc. - New York, NY Manufacturer: Wilson Mechanical Instrument Division, American Chain & Cable Co., Inc. - Bridgeport, CT Wilson Mechanical Instrument Co., Inc. - New York, NY Witnesses: Unknown	Patent Dates: Granted: Sep. 26, 1933 Patent Pictures: CIPO Data Espacenet patent Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Wilson Mechanical Instrument Co.
Description: Canadian equivalent of US patent 1,885,972, which covers improvements to the Rockwell hardness tester.

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