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US Patent: 1,531,490
Pneumatic drop hammer
Patentees: George P. Macready (exact or similar names) - Providence, RI William I. Seymour (exact or similar names) - West Barrington, RI USPTO Classifications: 192/131R, 91/424 Tool Categories: metalworking machines : forging machines : drop hammers Assignees: Franklin Machine Co. - Providence, RI Manufacturer: Franklin Machine Co. - Providence, RI Witnesses: Unknown	Patent Dates: Applied: Nov. 02, 1921 Granted: Mar. 31, 1925 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Franklin Machine Co.

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