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US Patent: 861,738
Grinding-machine
Patentee: Abraham B. Landis (exact or similar names) - Waynesboro, PA USPTO Classifications: 451/134, 451/142, 451/144 Tool Categories: metalworking machines : grinders Assignees: None Manufacturer: Landis Tool Co. - Waynesboro, PA Witnesses: R. W. Bradford A. M. Parkins	Patent Dates: Applied: Apr. 06, 1906 Granted: Jul. 30, 1907 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Landis Tool Co.
Description: Patent covers a roll grinding machine where the rolls can be given a longitudinally slightly convex or concave profile.

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