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US Patent: 1,949,517
Antislipping tread and method of making the same
Patentee: Edward Van der Pyl (exact or similar names) - Holden, MA USPTO Classifications: 264/256, 264/77, 404/19, 428/149, 428/15, 428/207, 428/325, 52/DIG.007 Tool Categories: Assignees: Norton Co. - Worcester, MA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 13, 1932 Granted: Mar. 06, 1934 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Norton Co.

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