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US Patent: 943,233
Exhaust-muffler
Patentee: John Boyle (exact or similar names) - Peabody, MA USPTO Classifications: 138/42, 165/154, 169/24, 181/279, 55/457 Tool Categories: propulsion and energy : internal combustion engines : mufflers Assignees: None Manufacturer: John Boyle Machine Co. - Peabody, MA Witnesses: W. P. Abell Arthur H. Brown	Patent Dates: Applied: Aug. 28, 1909 Granted: Dec. 14, 1909 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for John Boyle & Co.

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