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US Patent: 1,722,506
Drop hammer
Patentee: Henning G. Sahlin (exact or similar names) - Boston, MA USPTO Classifications: 192/131R, 91/27, 91/31, 91/410, 91/448 Tool Categories: metalworking machines : forging machines : drop hammers Assignees: Pneumatic Drop Hammer Co. - Boston, MA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Aug. 13, 1924 Granted: Jul. 30, 1929 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Pneumatic Drop Hammer Co.

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