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US Patent: 2,160,137
Safety Mechanism
Patentee: Albert F. Froussard (exact or similar names) - St. Louis, MO USPTO Classifications: 137/557, 137/68.22, 137/890, 137/895 Tool Categories: specialty machines : refrigeration apparatus Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 18, 1937 Granted: May 30, 1939 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Multiple Boring Machine Co.

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